diff --git a/net-proxy/ziproxy/files/ziproxy-3.1.3-libpng15.patch b/net-proxy/ziproxy/files/ziproxy-3.1.3-libpng15.patch
deleted file mode 100644
index 148a513e6f7dc..0000000000000
--- a/net-proxy/ziproxy/files/ziproxy-3.1.3-libpng15.patch
+++ /dev/null
@@ -1,20 +0,0 @@
---- src/image.c
-+++ src/image.c
-@@ -17,6 +17,8 @@
- #include <stdlib.h>
- #include <assert.h>
- 
-+#include <zlib.h>
-+
- #include <gif_lib.h>
- 
- #include <jpeglib.h>
-@@ -515,7 +517,7 @@
- 	bmp = new_raw_bitmap();
- 	*out = bmp;
- 
--	png_set_read_fn (png_ptr, (voidp) &desc, mem_to_png);
-+	png_set_read_fn (png_ptr, (png_voidp) &desc, mem_to_png);
- 	
- 	png_read_info (png_ptr,info_ptr);
- 	png_get_IHDR (png_ptr, info_ptr, &width_png_uint_32, &height_png_uint_32,