2 files changed, 2 insertions, 2 deletions
diff --git a/nixpkgs/pkgs/development/libraries/libpng/12.nix b/nixpkgs/pkgs/development/libraries/libpng/12.nix
index 14ae1156087b..7199695ae74b 100644
--- a/nixpkgs/pkgs/development/libraries/libpng/12.nix
+++ b/nixpkgs/pkgs/development/libraries/libpng/12.nix
@@ -22,7 +22,7 @@ stdenv.mkDerivation rec {
 
   meta = with stdenv.lib; {
     description = "The official reference implementation for the PNG file format";
-    homepage = http://www.libpng.org/pub/png/libpng.html;
+    homepage = "http://www.libpng.org/pub/png/libpng.html";
     license = licenses.libpng;
     maintainers = [ ];
     branch = "1.2";
diff --git a/nixpkgs/pkgs/development/libraries/libpng/default.nix b/nixpkgs/pkgs/development/libraries/libpng/default.nix
index 95ef62013464..489007bc417d 100644
--- a/nixpkgs/pkgs/development/libraries/libpng/default.nix
+++ b/nixpkgs/pkgs/development/libraries/libpng/default.nix
@@ -31,7 +31,7 @@ in stdenv.mkDerivation rec {
 
   meta = with stdenv.lib; {
     description = "The official reference implementation for the PNG file format" + whenPatched " with animation patch";
-    homepage = http://www.libpng.org/pub/png/libpng.html;
+    homepage = "http://www.libpng.org/pub/png/libpng.html";
     license = licenses.libpng2;
     platforms = platforms.all;
     maintainers = [ maintainers.vcunat ];