diff --git a/skeletons/INTEGER.c b/skeletons/INTEGER.c
index 1a00064..e4e0397 100644
--- a/skeletons/INTEGER.c
+++ b/skeletons/INTEGER.c
@@ -109,15 +109,18 @@
 	return der_encode_primitive(td, sptr, tag_mode, tag, cb, app_key);
 }
 
-static const asn_INTEGER_enum_map_t *INTEGER_map_enum2value(asn_INTEGER_specifics_t *specs, const char *lstart, const char *lstop);
+static const asn_INTEGER_enum_map_t *INTEGER_map_enum2value(
+    const asn_INTEGER_specifics_t *specs, const char *lstart,
+    const char *lstop);
 
 /*
  * INTEGER specific human-readable output.
  */
 static ssize_t
 INTEGER__dump(const asn_TYPE_descriptor_t *td, const INTEGER_t *st, asn_app_consume_bytes_f *cb, void *app_key, int plainOrXER) {
-	asn_INTEGER_specifics_t *specs=(asn_INTEGER_specifics_t *)td->specifics;
-	char scratch[32];	/* Enough for 64-bit integer */
+    const asn_INTEGER_specifics_t *specs =
+        (const asn_INTEGER_specifics_t *)td->specifics;
+    char scratch[32];	/* Enough for 64-bit integer */
 	uint8_t *buf = st->buf;
 	uint8_t *buf_end = st->buf + st->size;
 	intmax_t value;
@@ -241,8 +244,9 @@
 }
 
 static const asn_INTEGER_enum_map_t *
-INTEGER_map_enum2value(asn_INTEGER_specifics_t *specs, const char *lstart, const char *lstop) {
-	const asn_INTEGER_enum_map_t *el_found;
+INTEGER_map_enum2value(const asn_INTEGER_specifics_t *specs, const char *lstart,
+                       const char *lstop) {
+    const asn_INTEGER_enum_map_t *el_found;
 	int count = specs ? specs->map_count : 0;
 	struct e2v_key key;
 	const char *lp;
@@ -289,7 +293,7 @@
 }
 
 const asn_INTEGER_enum_map_t *
-INTEGER_map_value2enum(asn_INTEGER_specifics_t *specs, long value) {
+INTEGER_map_value2enum(const asn_INTEGER_specifics_t *specs, long value) {
 	int count = specs ? specs->map_count : 0;
 	if(!count) return 0;
 	return (asn_INTEGER_enum_map_t *)bsearch(&value, specs->value2enum,
@@ -417,7 +421,7 @@
 			if(state == ST_LEADSPACE) {
 				const asn_INTEGER_enum_map_t *el;
 				el = INTEGER_map_enum2value(
-					(asn_INTEGER_specifics_t *)
+					(const asn_INTEGER_specifics_t *)
 					td->specifics, lstart, lstop);
 				if(el) {
 					ASN_DEBUG("Found \"%s\" => %ld",
@@ -568,8 +572,9 @@
 INTEGER_decode_uper(asn_codec_ctx_t *opt_codec_ctx, asn_TYPE_descriptor_t *td,
                     const asn_per_constraints_t *constraints, void **sptr,
                     asn_per_data_t *pd) {
-    asn_INTEGER_specifics_t *specs=(asn_INTEGER_specifics_t *)td->specifics;
-	asn_dec_rval_t rval = { RC_OK, 0 };
+    const asn_INTEGER_specifics_t *specs =
+        (const asn_INTEGER_specifics_t *)td->specifics;
+    asn_dec_rval_t rval = { RC_OK, 0 };
 	INTEGER_t *st = (INTEGER_t *)*sptr;
 	const asn_per_constraint_t *ct;
 	int repeat;
@@ -680,8 +685,9 @@
 INTEGER_encode_uper(asn_TYPE_descriptor_t *td,
                     const asn_per_constraints_t *constraints, void *sptr,
                     asn_per_outp_t *po) {
-    asn_INTEGER_specifics_t *specs=(asn_INTEGER_specifics_t *)td->specifics;
-	asn_enc_rval_t er;
+    const asn_INTEGER_specifics_t *specs =
+        (const asn_INTEGER_specifics_t *)td->specifics;
+    asn_enc_rval_t er;
 	INTEGER_t *st = (INTEGER_t *)sptr;
 	const uint8_t *buf;
 	const uint8_t *end;
diff --git a/skeletons/INTEGER.h b/skeletons/INTEGER.h
index 5313b58..a2c15af 100644
--- a/skeletons/INTEGER.h
+++ b/skeletons/INTEGER.h
@@ -85,7 +85,8 @@
 /*
  * Convert the integer value into the corresponding enumeration map entry.
  */
-const asn_INTEGER_enum_map_t *INTEGER_map_value2enum(asn_INTEGER_specifics_t *specs, long value);
+const asn_INTEGER_enum_map_t *INTEGER_map_value2enum(
+    const asn_INTEGER_specifics_t *specs, long value);
 
 #ifdef __cplusplus
 }
diff --git a/skeletons/INTEGER_oer.c b/skeletons/INTEGER_oer.c
index 3462f7c..5b40c43 100644
--- a/skeletons/INTEGER_oer.c
+++ b/skeletons/INTEGER_oer.c
@@ -13,7 +13,8 @@
 INTEGER_decode_oer(asn_codec_ctx_t *opt_codec_ctx, asn_TYPE_descriptor_t *td,
                    const asn_oer_constraints_t *constraints, void **sptr,
                    const void *ptr, size_t size) {
-    asn_INTEGER_specifics_t *specs = (asn_INTEGER_specifics_t *)td->specifics;
+    const asn_INTEGER_specifics_t *specs =
+        (const asn_INTEGER_specifics_t *)td->specifics;
     asn_dec_rval_t rval = {RC_OK, 0};
     INTEGER_t *st = (INTEGER_t *)*sptr;
     struct asn_oer_constraint_number_s ct = {0, 0};
diff --git a/skeletons/NativeEnumerated.c b/skeletons/NativeEnumerated.c
index 0278657..4bd9ec9 100644
--- a/skeletons/NativeEnumerated.c
+++ b/skeletons/NativeEnumerated.c
@@ -58,9 +58,10 @@
 NativeEnumerated_encode_xer(asn_TYPE_descriptor_t *td, void *sptr,
         int ilevel, enum xer_encoder_flags_e flags,
                 asn_app_consume_bytes_f *cb, void *app_key) {
-	asn_INTEGER_specifics_t *specs=(asn_INTEGER_specifics_t *)td->specifics;
-        asn_enc_rval_t er;
-        const long *native = (const long *)sptr;
+    const asn_INTEGER_specifics_t *specs =
+        (const asn_INTEGER_specifics_t *)td->specifics;
+    asn_enc_rval_t er;
+    const long *native = (const long *)sptr;
 	const asn_INTEGER_enum_map_t *el;
 
         (void)ilevel;
@@ -88,8 +89,9 @@
 NativeEnumerated_decode_uper(asn_codec_ctx_t *opt_codec_ctx,
 	asn_TYPE_descriptor_t *td, const asn_per_constraints_t *constraints,
 	void **sptr, asn_per_data_t *pd) {
-	asn_INTEGER_specifics_t *specs = (asn_INTEGER_specifics_t *)td->specifics;
-	asn_dec_rval_t rval = { RC_OK, 0 };
+    const asn_INTEGER_specifics_t *specs =
+        (const asn_INTEGER_specifics_t *)td->specifics;
+    asn_dec_rval_t rval = { RC_OK, 0 };
 	long *native = (long *)*sptr;
 	const asn_per_constraint_t *ct;
 	long value;
@@ -154,8 +156,9 @@
 NativeEnumerated_encode_uper(asn_TYPE_descriptor_t *td,
                              const asn_per_constraints_t *constraints,
                              void *sptr, asn_per_outp_t *po) {
-    asn_INTEGER_specifics_t *specs = (asn_INTEGER_specifics_t *)td->specifics;
-	asn_enc_rval_t er;
+    const asn_INTEGER_specifics_t *specs =
+        (const asn_INTEGER_specifics_t *)td->specifics;
+    asn_enc_rval_t er;
 	long native, value;
 	const asn_per_constraint_t *ct;
 	int inext = 0;
diff --git a/skeletons/NativeInteger.c b/skeletons/NativeInteger.c
index d5c0279..fd68615 100644
--- a/skeletons/NativeInteger.c
+++ b/skeletons/NativeInteger.c
@@ -62,8 +62,9 @@
 NativeInteger_decode_ber(asn_codec_ctx_t *opt_codec_ctx,
 	asn_TYPE_descriptor_t *td,
 	void **nint_ptr, const void *buf_ptr, size_t size, int tag_mode) {
-	asn_INTEGER_specifics_t *specs=(asn_INTEGER_specifics_t *)td->specifics;
-	long *native = (long *)*nint_ptr;
+    const asn_INTEGER_specifics_t *specs =
+        (const asn_INTEGER_specifics_t *)td->specifics;
+    long *native = (long *)*nint_ptr;
 	asn_dec_rval_t rval;
 	ber_tlv_len_t length;
 
@@ -184,8 +185,9 @@
 NativeInteger_decode_xer(asn_codec_ctx_t *opt_codec_ctx,
 	asn_TYPE_descriptor_t *td, void **sptr, const char *opt_mname,
 		const void *buf_ptr, size_t size) {
-	asn_INTEGER_specifics_t *specs=(asn_INTEGER_specifics_t *)td->specifics;
-	asn_dec_rval_t rval;
+    const asn_INTEGER_specifics_t *specs =
+        (const asn_INTEGER_specifics_t *)td->specifics;
+    asn_dec_rval_t rval;
 	INTEGER_t st;
 	void *st_ptr = (void *)&st;
 	long *native = (long *)*sptr;
@@ -225,8 +227,9 @@
 NativeInteger_encode_xer(asn_TYPE_descriptor_t *td, void *sptr,
 	int ilevel, enum xer_encoder_flags_e flags,
 		asn_app_consume_bytes_f *cb, void *app_key) {
-	asn_INTEGER_specifics_t *specs=(asn_INTEGER_specifics_t *)td->specifics;
-	char scratch[32];	/* Enough for 64-bit int */
+    const asn_INTEGER_specifics_t *specs =
+        (const asn_INTEGER_specifics_t *)td->specifics;
+    char scratch[32];	/* Enough for 64-bit int */
 	asn_enc_rval_t er;
 	const long *native = (const long *)sptr;
 
@@ -252,8 +255,9 @@
                           asn_TYPE_descriptor_t *td,
                           const asn_per_constraints_t *constraints, void **sptr,
                           asn_per_data_t *pd) {
-    asn_INTEGER_specifics_t *specs=(asn_INTEGER_specifics_t *)td->specifics;
-	asn_dec_rval_t rval;
+    const asn_INTEGER_specifics_t *specs =
+        (const asn_INTEGER_specifics_t *)td->specifics;
+    asn_dec_rval_t rval;
 	long *native = (long *)*sptr;
 	INTEGER_t tmpint;
 	void *tmpintptr = &tmpint;
@@ -287,8 +291,9 @@
 NativeInteger_encode_uper(asn_TYPE_descriptor_t *td,
                           const asn_per_constraints_t *constraints, void *sptr,
                           asn_per_outp_t *po) {
-    asn_INTEGER_specifics_t *specs=(asn_INTEGER_specifics_t *)td->specifics;
-	asn_enc_rval_t er;
+    const asn_INTEGER_specifics_t *specs =
+        (const asn_INTEGER_specifics_t *)td->specifics;
+    asn_enc_rval_t er;
 	long native;
 	INTEGER_t tmpint;
 
@@ -316,8 +321,9 @@
 int
 NativeInteger_print(asn_TYPE_descriptor_t *td, const void *sptr, int ilevel,
 	asn_app_consume_bytes_f *cb, void *app_key) {
-	asn_INTEGER_specifics_t *specs=(asn_INTEGER_specifics_t *)td->specifics;
-	const long *native = (const long *)sptr;
+    const asn_INTEGER_specifics_t *specs =
+        (const asn_INTEGER_specifics_t *)td->specifics;
+    const long *native = (const long *)sptr;
 	char scratch[32];	/* Enough for 64-bit int */
 	int ret;
 
diff --git a/skeletons/NativeInteger_oer.c b/skeletons/NativeInteger_oer.c
index 8cd9fec..58490dd 100644
--- a/skeletons/NativeInteger_oer.c
+++ b/skeletons/NativeInteger_oer.c
@@ -14,7 +14,8 @@
                          asn_TYPE_descriptor_t *td,
                          const asn_oer_constraints_t *constraints,
                          void **nint_ptr, const void *ptr, size_t size) {
-    asn_INTEGER_specifics_t *specs = (asn_INTEGER_specifics_t *)td->specifics;
+    const asn_INTEGER_specifics_t *specs =
+        (const asn_INTEGER_specifics_t *)td->specifics;
     asn_dec_rval_t rval = {RC_OK, 0};
     long *native = (long *)*nint_ptr;
     INTEGER_t tmpint;
@@ -70,7 +71,8 @@
 NativeInteger_encode_oer(asn_TYPE_descriptor_t *td,
                          const asn_oer_constraints_t *constraints, void *sptr,
                          asn_app_consume_bytes_f *cb, void *app_key) {
-    asn_INTEGER_specifics_t *specs = (asn_INTEGER_specifics_t *)td->specifics;
+    const asn_INTEGER_specifics_t *specs =
+        (const asn_INTEGER_specifics_t *)td->specifics;
     INTEGER_t tmpint;
     long native;