diff --git a/pkgs/applications/networking/irc/quassel/qt-5.nix b/pkgs/applications/networking/irc/quassel/qt-5.nix
index 8e75f16dbda4..b5075fe20758 100644
--- a/pkgs/applications/networking/irc/quassel/qt-5.nix
+++ b/pkgs/applications/networking/irc/quassel/qt-5.nix
@@ -43,6 +43,14 @@ in with stdenv; mkDerivation rec {
     sha256 = "15vqjiw38mifvnc95bhvy0zl23xxldkwg2byx9xqbyw8rfgggmkb";
   };
 
+  patches = [
+    # fix build with Qt 5.5
+    (fetchurl {
+      url = "https://github.com/quassel/quassel/commit/078477395aaec1edee90922037ebc8a36b072d90.patch";
+      sha256 = "1njwnay7pjjw0g7m0x5cwvck8xcznc7jbdfyhbrd121nc7jgpbc5";
+    })
+  ];
+
   enableParallelBuilding = true;
 
   buildInputs =