diff --git a/makefile b/makefile
index 2066a55e..46d6b74a 100644
--- a/makefile
+++ b/makefile
@@ -393,6 +393,13 @@ ifeq ($(WIN32),)  #*nix Environments (&& cygwin)
       endif
     endif
   endif
+  ifneq (,$(call find_include,png))
+    ifneq (,$(call find_lib,png))
+      OS_CCDEFS += -DHAVE_LIBPNG
+      OS_LDFLAGS += -lpng
+      $(info using libpng: $(call find_lib,png) $(call find_include,png))
+    endif
+  endif
   ifneq (,$(call find_include,glob))
     OS_CCDEFS += -DHAVE_GLOB
   else