diff --git a/pkgs/by-name/cp/cpu-x/package.nix b/pkgs/by-name/cp/cpu-x/package.nix
index ee148ac4decf..0e49d8b20181 100644
--- a/pkgs/by-name/cp/cpu-x/package.nix
+++ b/pkgs/by-name/cp/cpu-x/package.nix
@@ -28,6 +28,7 @@
   dbus,
   at-spi2-core,
   libXtst,
+  gtkmm3,
 }:
 
 # Known issues:
@@ -55,6 +56,7 @@ stdenv.mkDerivation rec {
 
   buildInputs = [
     gtk3
+    gtkmm3
     ncurses
     libcpuid
     pciutils