--- include/pi-md5.h.in	2010-02-07 04:42:49.000000000 +0100
+++ include/pi-md5.h.in	2016-12-20 14:03:39.781946035 +0100
@@ -22,7 +22,7 @@
 #if HAVE_STDINT_H
 #include <stdint.h>
 #endif
-#ifdef HAVE_INTTYPES_H || HAVE_STDINT_H
+#if defined(HAVE_INTTYPES_H) || defined(HAVE_STDINT_H)
 #define UINT8 uint8_t
 #define UINT32 uint32_t
 #else
