diff --git a/src/etag.c b/src/etag.c
index c1146c30..630956ff 100644
--- a/src/etag.c
+++ b/src/etag.c
@@ -1,5 +1,14 @@
 #include <string.h>
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#if defined HAVE_STDINT_H
 #include <stdint.h>
+#elif defined HAVE_INTTYPES_H
+#include <inttypes.h>
+#endif
 
 #include "buffer.h"
 #include "etag.h"