diff --git a/pkgs/kde/gear/kalzium/default.nix b/pkgs/kde/gear/kalzium/default.nix
index 7cdcd1efec63..39327304ac3f 100644
--- a/pkgs/kde/gear/kalzium/default.nix
+++ b/pkgs/kde/gear/kalzium/default.nix
@@ -1,5 +1,6 @@
 {
   mkKdeDerivation,
+  fetchpatch,
   pkg-config,
   ocaml,
   eigen,
@@ -10,6 +11,15 @@
 mkKdeDerivation {
   pname = "kalzium";
 
+  patches = [
+    # Fix build with Qt 6.8
+    # FIXME: remove in next major update
+    (fetchpatch {
+      url = "https://invent.kde.org/education/kalzium/-/commit/557d9bc96636f413430d0789cbf775915fc0dc45.patch";
+      hash = "sha256-KDCT/COqk7OTuF8pN7qrRrIPRU4PSGm+efpCDGbtZwA=";
+    })
+  ];
+
   # FIXME: look into how to make it find libfacile
   extraNativeBuildInputs = [
     pkg-config