diff -NrU5 libwmf-0.2.8.4.orig/src/ipa/ipa.c libwmf-0.2.8.4/src/ipa/ipa.c
--- libwmf-0.2.8.4.orig/src/ipa/ipa.c	2009-05-10 23:41:17.000000000 +0200
+++ libwmf-0.2.8.4/src/ipa/ipa.c	2009-05-11 00:07:43.000000000 +0200
@@ -33,10 +33,16 @@
 
 /* Define WMF_API if this is module so that ipa headers are included via "wmfdefs.h" first
  */
 #define WMF_IPA 1
 
+#ifndef HAVE_GD
+#ifdef HAVE_LIBPNG
+#include <png.h>
+#endif /* HAVE_LIBPNG */
+#endif /* HAVE_GD */
+
 #include "wmfdefs.h"
 
 #include "ipa/ipa.h"
 #include "ipa/ipa/bmp.h"   /* Provides default bitmap functionality */