--- a/makefiledir/Makefile.libdetection	Thu Mar 30 19:16:44 2006 +0000
+++ b/makefiledir/Makefile.libdetection	Thu Mar 30 20:14:06 2006 +0000
@@ -68,6 +68,9 @@
 SDL-CONFIG:=sdl-config
 endif
 
+# set libpng-config to the default value
+LIBPNG-CONFIG :=libpng-config
+
 # Networking, enabled by default
 WITH_NETWORK:=1