$OpenBSD: patch-backend_CMakeLists_txt,v 1.2 2018/01/10 15:12:08 kirby Exp $
Index: backend/CMakeLists.txt
--- backend/CMakeLists.txt.orig
+++ backend/CMakeLists.txt
@@ -12,7 +12,7 @@ set(zint_OUTPUT_SRCS render.c ps.c svg.c emf.c bmp.c p
 set(zint_SRCS ${zint_OUTPUT_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)
