diff --git a/libasn1compiler/asn1c_naming.h b/libasn1compiler/asn1c_naming.h
index 2e0e88d..737f133 100644
--- a/libasn1compiler/asn1c_naming.h
+++ b/libasn1compiler/asn1c_naming.h
@@ -16,4 +16,13 @@
 const char *c_member_name(arg_t *, asn1p_expr_t *);     /* %s_%s */
 const char *c_presence_name(arg_t *, asn1p_expr_t *);   /* %s_PR_%s */
 
+/*
+ * Returns 0 if no C name clashes have been encountered.
+ * Returns 1 if C name clashes have been encountered.
+ * Prints out the clashing items and suggests -fcompound-names.
+ */
+int c_name_clash(arg_t *arg);
+
+void c_name_clash_finder_init(void);
+
 #endif	/* ASN1_COMPILER_NAMING_H */