diff --git a/var/spack/repos/builtin/packages/unifyfs/package.py b/var/spack/repos/builtin/packages/unifyfs/package.py
index fa2824b7a56..efbe4ee6827 100644
--- a/var/spack/repos/builtin/packages/unifyfs/package.py
+++ b/var/spack/repos/builtin/packages/unifyfs/package.py
@@ -110,3 +110,8 @@ def hdf5_compiler_path(name):
     def autoreconf(self, spec, prefix):
         bash = which('bash')
         bash('./autogen.sh')
+
+    @when('%cce@11.0.3:')
+    def patch(self):
+        filter_file('-Werror', '', 'client/src/Makefile.in')
+        filter_file('-Werror', '', 'client/src/Makefile.am')