diff --git a/src/avrpart.c b/src/avrpart.c
index 4ebd4eef..3f2461ef 100644
--- a/src/avrpart.c
+++ b/src/avrpart.c
@@ -23,6 +23,7 @@
 #include <stdlib.h>
 #include <string.h>
 
+#include "ac_cfg.h"
 #include "avrdude.h"
 #include "libavrdude.h"
 
diff --git a/src/confwin.c b/src/confwin.c
index 9624947f..06f18e20 100644
--- a/src/confwin.c
+++ b/src/confwin.c
@@ -17,6 +17,7 @@
  */
 
 
+#include "ac_cfg.h"
 #include "avrdude.h"
 #include "libavrdude.h"
 
diff --git a/src/pindefs.c b/src/pindefs.c
index 5acb33fd..63ae295a 100644
--- a/src/pindefs.c
+++ b/src/pindefs.c
@@ -22,6 +22,7 @@
 #include <stdio.h>
 #include <stdlib.h>
 
+#include "ac_cfg.h"
 #include "avrdude.h"
 #include "libavrdude.h"