diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 6baf099ddbe3..feba777086f2 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -13346,9 +13346,7 @@ with pkgs;
 
   snet = callPackage ../tools/networking/snet { };
 
-  sng = callPackage ../tools/graphics/sng {
-    libpng = libpng12;
-  };
+  sng = callPackage ../tools/graphics/sng { };
 
   snmpcheck = callPackage ../tools/networking/snmpcheck { };