$OpenBSD$
--- backend/CMakeLists.txt.orig	Mon Apr  4 14:03:37 2011
+++ backend/CMakeLists.txt	Mon Apr  4 14:03:58 2011
@@ -11,7 +11,7 @@ set(zint_TWODIM_SRCS code16k.c dmatrix.c pdf417.c qr.c
 set(zint_SRCS ${zint_COMMON_SRCS} ${zint_ONEDIM_SRCS} ${zint_POSTAL_SRCS} ${zint_TWODIM_SRCS} )
 
 if(PNG_FOUND)
-    include_directories( ${PNG_INCLUDES} )
+    include_directories( ${PNG_INCLUDE_DIR} )
 else(PNG_FOUND)
     add_definitions (-DNO_PNG)
 endif(PNG_FOUND)