diff --git a/ChangeLog b/ChangeLog
index 541b4467..1ac9abe5 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+2013-05-06  Joerg Wunsch <j.gnu@uriah.heep.sax.de>
+
+	* pindefs.h: Include "ac_cfg.h" before testing for HAVE_* macros.
+
 2013-05-05  Rene Liebscher <R.Liebscher@gmx.de>
 
 	* main.c: revert to rev 1159 (doing pgm_display after pgm_open)
diff --git a/pindefs.h b/pindefs.h
index 252d67bc..487c7afb 100644
--- a/pindefs.h
+++ b/pindefs.h
@@ -23,6 +23,8 @@
 
 #include <limits.h>
 
+#include "ac_cfg.h"
+
 /* lets try to select at least 32 bits */
 #ifdef HAVE_STDINT_H
 #include <stdint.h>