diff --git a/pkgs/development/libraries/gtk/2.x.nix b/pkgs/development/libraries/gtk/2.x.nix
index 015d998b3d7..539cfc37051 100644
--- a/pkgs/development/libraries/gtk/2.x.nix
+++ b/pkgs/development/libraries/gtk/2.x.nix
@@ -37,7 +37,7 @@ let
   };
 in
 stdenv.mkDerivation (finalAttrs: {
-  pname = "gtk2";
+  pname = "gtk+";
   version = "2.24.33";
 
   src = fetchurl {
diff --git a/pkgs/development/libraries/gtk/3.x.nix b/pkgs/development/libraries/gtk/3.x.nix
index dc664a961c4..a527faf5a8b 100644
--- a/pkgs/development/libraries/gtk/3.x.nix
+++ b/pkgs/development/libraries/gtk/3.x.nix
@@ -62,7 +62,7 @@ let
 in
 
 stdenv.mkDerivation (finalAttrs: {
-  pname = "gtk3";
+  pname = "gtk+3";
   version = "3.24.38";
 
   outputs = [ "out" "dev" ] ++ lib.optional withIntrospection "devdoc";