diff --git a/pkgs/by-name/gn/gnome-calculator/package.nix b/pkgs/by-name/gn/gnome-calculator/package.nix
index 67500d02803a..16bfbe636829 100644
--- a/pkgs/by-name/gn/gnome-calculator/package.nix
+++ b/pkgs/by-name/gn/gnome-calculator/package.nix
@@ -9,6 +9,7 @@
   gettext,
   itstool,
   fetchurl,
+  fetchpatch,
   pkg-config,
   libxml2,
   gtk4,
@@ -34,6 +35,14 @@ stdenv.mkDerivation (finalAttrs: {
     hash = "sha256-3fTNLt2hNcQcivaPnAzc2dmpFjy59/jijKLI6B/Ydlc=";
   };
 
+  patches = [
+    # Fix tests with GNU MPC 1.4.0
+    (fetchpatch {
+      url = "https://gitlab.gnome.org/GNOME/gnome-calculator/-/commit/c9bf69ce3688390a584ca7571ea5fcda5aea8863.patch";
+      hash = "sha256-FoV6SUprVdNcRORpoi+bNMTjzMM8bmXuze+6C9lqF8E=";
+    })
+  ];
+
   nativeBuildInputs = [
     appstream
     blueprint-compiler