diff --git a/lib/asn1/libasn1.h b/lib/asn1/libasn1.h
index 2be8ad2e1..16dc34ff1 100644
--- a/lib/asn1/libasn1.h
+++ b/lib/asn1/libasn1.h
@@ -41,6 +41,10 @@
 #ifndef __LIBASN1_H__
 #define __LIBASN1_H__
 
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
 #include <stdlib.h>
 #include <errno.h>
 #include "asn1.h"
diff --git a/lib/hdb/libasn1.h b/lib/hdb/libasn1.h
index 3ff7bec93..c588ce6ed 100644
--- a/lib/hdb/libasn1.h
+++ b/lib/hdb/libasn1.h
@@ -41,6 +41,10 @@
 #ifndef __LIBASN1_H__
 #define __LIBASN1_H__
 
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
 #include <stdlib.h>
 #include <errno.h>
 #include <asn1.h>