formatting
diff --git a/skeletons/asn_codecs_prim.h b/skeletons/asn_codecs_prim.h
index 3399ee7..fbc5576 100644
--- a/skeletons/asn_codecs_prim.h
+++ b/skeletons/asn_codecs_prim.h
@@ -12,7 +12,7 @@
 #endif
 
 typedef struct ASN__PRIMITIVE_TYPE_s {
-	uint8_t *buf;	/* Buffer with consecutive primitive encoding bytes */
+    uint8_t *buf;   /* Buffer with consecutive primitive encoding bytes */
     size_t size;    /* Size of the buffer */
 } ASN__PRIMITIVE_TYPE_t;	/* Do not use this type directly! */
 
@@ -24,15 +24,15 @@
  * A callback specification for the xer_decode_primitive() function below.
  */
 enum xer_pbd_rval {
-	XPBD_SYSTEM_FAILURE,	/* System failure (memory shortage, etc) */
-	XPBD_DECODER_LIMIT,	/* Hit some decoder limitation or deficiency */
-	XPBD_BROKEN_ENCODING,	/* Encoding of a primitive body is broken */
-	XPBD_NOT_BODY_IGNORE,	/* Not a body format, but safe to ignore */
-	XPBD_BODY_CONSUMED	/* Body is recognized and consumed */
+    XPBD_SYSTEM_FAILURE,  /* System failure (memory shortage, etc) */
+    XPBD_DECODER_LIMIT,   /* Hit some decoder limitation or deficiency */
+    XPBD_BROKEN_ENCODING, /* Encoding of a primitive body is broken */
+    XPBD_NOT_BODY_IGNORE, /* Not a body format, but safe to ignore */
+    XPBD_BODY_CONSUMED    /* Body is recognized and consumed */
 };
 typedef enum xer_pbd_rval(xer_primitive_body_decoder_f)(
-    const asn_TYPE_descriptor_t *td, void *struct_ptr,
-    const void *chunk_buf, size_t chunk_size);
+    const asn_TYPE_descriptor_t *td, void *struct_ptr, const void *chunk_buf,
+    size_t chunk_size);
 
 /*
  * Specific function to decode simple primitive types.