portability fixes

diff --git a/libasn1fix/asn1fix_crange.c b/libasn1fix/asn1fix_crange.c
index 974aa21..1e6a0d0 100644
--- a/libasn1fix/asn1fix_crange.c
+++ b/libasn1fix/asn1fix_crange.c
@@ -1,6 +1,6 @@
-#include <asn1fix_internal.h>
-#include <asn1fix_constraint.h>
-#include <asn1fix_crange.h>
+#include "asn1fix_internal.h"
+#include "asn1fix_constraint.h"
+#include "asn1fix_crange.h"
 
 #undef	FATAL
 #define	FATAL(fmt, args...)	do {			\