diff --git a/pkgs/applications/networking/mumble/default.nix b/pkgs/applications/networking/mumble/default.nix
index 8f1960b58cd8..cda02fedfb69 100644
--- a/pkgs/applications/networking/mumble/default.nix
+++ b/pkgs/applications/networking/mumble/default.nix
@@ -27,6 +27,7 @@ let
       ++ (overrides.buildInputs or [ ]);
 
     qmakeFlags = [
+      "CONFIG+=c++11"
       "CONFIG+=shared"
       "CONFIG+=no-g15"
       "CONFIG+=packaged"