diff --git a/src/asn1c_helpers.h b/src/asn1c_helpers.h
index 8d4e676..ac34a8f 100644
--- a/src/asn1c_helpers.h
+++ b/src/asn1c_helpers.h
@@ -1,5 +1,6 @@
 #pragma once
 
+#include <asn_application.h>
 struct asn_TYPE_descriptor_t;
 
 const char *asn_type_name(const asn_TYPE_descriptor_t *td);