diff --git a/skeletons/NativeInteger_oer.c b/skeletons/NativeInteger_oer.c
new file mode 100644
index 0000000..15560bd
--- /dev/null
+++ b/skeletons/NativeInteger_oer.c
@@ -0,0 +1,104 @@
+/*
+ * Copyright (c) 2017 Lev Walkin <vlm@lionet.info>.
+ * All rights reserved.
+ * Redistribution and modifications are permitted subject to BSD license.
+ */
+#ifndef ASN_DISABLE_OER_SUPPORT
+
+#include <asn_internal.h>
+#include <NativeInteger.h>
+#include <errno.h>
+
+asn_dec_rval_t
+NativeInteger_decode_oer(asn_codec_ctx_t *opt_codec_ctx,
+                         asn_TYPE_descriptor_t *td,
+                         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;
+    asn_dec_rval_t rval = {RC_OK, 0};
+    long *native = (long *)*nint_ptr;
+    asn_oer_constraint_t *ct;
+
+    (void)opt_codec_ctx;
+    (void)specs;
+
+    if(!native) {
+        native = (long *)(*nint_ptr = CALLOC(1, sizeof(*native)));
+        if(!native) ASN__DECODE_FAILED;
+    }
+
+    if(!constraints) constraints = td->oer_constraints;
+    ct = constraints ? &constraints->value : 0;
+
+    INTEGER_t tmpint;
+    INTEGER_t *tmpintptr = &tmpint;
+    memset(&tmpint, 0, sizeof(tmpint));
+
+    /*
+     * OPTIMIZATION: Encode directly rather than passing through INTEGER.
+     * Saves a memory allocation.
+     */
+    rval = INTEGER_decode_oer(opt_codec_ctx, &asn_DEF_INTEGER, constraints,
+                              (void **)&tmpintptr, ptr, size);
+    if(rval.code != RC_OK) {
+        ASN_STRUCT_FREE_CONTENTS_ONLY(asn_DEF_INTEGER, &tmpint);
+        return rval;
+    }
+
+    if(specs && specs->field_unsigned) {
+        unsigned long ul;
+        if(asn_INTEGER2ulong(&tmpint, &ul) != 0) {
+            ASN_STRUCT_FREE_CONTENTS_ONLY(asn_DEF_INTEGER, &tmpint);
+            rval.code = RC_FAIL;
+            rval.consumed = 0;
+            return rval;
+        } else {
+            *native = ul;
+        }
+    } else {
+        long l;
+        if(asn_INTEGER2long(&tmpint, &l) != 0) {
+            ASN_STRUCT_FREE_CONTENTS_ONLY(asn_DEF_INTEGER, &tmpint);
+            rval.code = RC_FAIL;
+            rval.consumed = 0;
+            return rval;
+        } else {
+            *native = l;
+        }
+    }
+
+    return rval;
+}
+
+/*
+ * Encode as Canonical OER.
+ */
+asn_enc_rval_t
+NativeInteger_encode_oer(asn_TYPE_descriptor_t *td,
+                   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;
+    long native;
+
+    if(!sptr) ASN__ENCODE_FAILED;
+
+    native = *(const long *)sptr;
+
+    ASN_DEBUG("Encoding %s %ld as NativeInteger", td ? td->name : "", native);
+
+    INTEGER_t tmpint;
+    memset(&tmpint, 0, sizeof(tmpint));
+
+    if((specs && specs->field_unsigned) ? asn_ulong2INTEGER(&tmpint, native)
+                                        : asn_long2INTEGER(&tmpint, native)) {
+        ASN_STRUCT_FREE_CONTENTS_ONLY(asn_DEF_INTEGER, &tmpint);
+        ASN__ENCODE_FAILED;
+    } else {
+        asn_enc_rval_t er =
+            INTEGER_encode_oer(td, constraints, &tmpint, cb, app_key);
+        ASN_STRUCT_FREE_CONTENTS_ONLY(asn_DEF_INTEGER, &tmpint);
+        return er;
+    }
+}
+
+#endif  /* ASN_DISABLE_OER_SUPPORT */