diff --git a/var/spack/repos/builtin/packages/gtkplus/package.py b/var/spack/repos/builtin/packages/gtkplus/package.py
index 10437d209f1..3a32d25ae43 100644
--- a/var/spack/repos/builtin/packages/gtkplus/package.py
+++ b/var/spack/repos/builtin/packages/gtkplus/package.py
@@ -88,6 +88,8 @@ class Gtkplus(AutotoolsPackage, MesonPackage):
     depends_on("cups", when="+cups")
     depends_on("libxfixes", when="@:2")
 
+    conflicts("%gcc@14:", when="@:3.24.35")
+
     patch("no-demos.patch", when="@2.0:2")
 
     def url_for_version(self, version):