diff --git a/libasn1fix/asn1fix_misc.h b/libasn1fix/asn1fix_misc.h
new file mode 100644
index 0000000..e88e432
--- /dev/null
+++ b/libasn1fix/asn1fix_misc.h
@@ -0,0 +1,47 @@
+/*
+ * Miscellaneous functions necessary for several other modules.
+ */
+#ifndef	_ASN1FIX_MISC_H_
+#define	_ASN1FIX_MISC_H_
+
+/*
+ * Return a pointer to the locally held string with human-readable
+ * definition of the value.
+ */
+char const *asn1f_printable_value(asn1p_value_t *);
+
+/*
+ * Return a pointer to the locally held string with human-readable
+ * definition of the reference.
+ */
+char const *asn1f_printable_reference(asn1p_ref_t *);
+
+/*
+ * Recursively invoke a given function over the given expr and all its
+ * children.
+ */
+int asn1f_recurse_expr(arg_t *arg, int (*f)(arg_t *arg));
+
+/*
+ * Check that every child of a given expr has unique name or does not have any.
+ * If opt_compare == NULL, the default comparison of the argument's
+ * names (identifiers) will be performed.
+ */
+int asn1f_check_unique_expr(arg_t *arg,
+		int (*opt_compare)(asn1p_expr_t *a, asn1p_expr_t *b));
+
+/*
+ * Check that every preceeding child of the given expr is not
+ * having the name of the given one.
+ * If opt_compare == NULL, the default comparison of the argument's
+ * names (identifiers) will be performed.
+ */
+int asn1f_check_unique_expr_child(arg_t *arg, asn1p_expr_t *child,
+		int (*opt_compare)(asn1p_expr_t *a, asn1p_expr_t *b));
+
+/*
+ * Return number of children.
+ */
+int asn1f_count_children(asn1p_expr_t *parent);
+
+#endif	/* _ASN1FIX_MISC_H_ */