--- dillo-3.0.4/configure.ac.orig	2014-04-11 21:29:42.413940247 +0200
+++ dillo-3.0.4/configure.ac	2014-04-11 21:30:37.783645035 +0200
@@ -208,7 +208,10 @@ if test "x$enable_png" = "xyes"; then
 
 dnl Check if the user hasn't set the variable $PNG_CONFIG
   if test -z "$PNG_CONFIG"; then
-    PNG_CONFIG=`which libpng14-config`
+    PNG_CONFIG=`which libpng16-config`
+    if test -z "$PNG_CONFIG"; then
+      PNG_CONFIG=`which libpng14-config`
+    fi
     if test -z "$PNG_CONFIG"; then
       PNG_CONFIG=`which libpng12-config`
     fi