diff --git a/scripts/pnglibconf.h.prebuilt b/scripts/pnglibconf.h.prebuilt
index 5e97d44d3..f75bf3090 100644
--- a/scripts/pnglibconf.h.prebuilt
+++ b/scripts/pnglibconf.h.prebuilt
@@ -3,7 +3,7 @@
 
 /* pnglibconf.h - library build configuration */
 
-/* Libpng 1.5.10beta01 - February 23, 2012 */
+/* Libpng %VER% - %DATE% */
 
 /* Copyright (c) 1998-2011 Glenn Randers-Pehrson */
 
@@ -33,8 +33,8 @@
 #define PNG_sCAL_PRECISION 5
 #define PNG_USER_CHUNK_CACHE_MAX 0
 #define PNG_USER_CHUNK_MALLOC_MAX 0
-#define PNG_USER_HEIGHT_MAX 1000000
-#define PNG_USER_WIDTH_MAX 1000000
+#define PNG_USER_HEIGHT_MAX 0x7ffffffL
+#define PNG_USER_WIDTH_MAX 0x7ffffffL
 #define PNG_WEIGHT_SHIFT 8
 #define PNG_ZBUF_SIZE 8192
 /* end of settings */