diff --git a/.ci/license-header.sh b/.ci/license-header.sh
index fcc2c1f583..19e5bfeb5c 100755
--- a/.ci/license-header.sh
+++ b/.ci/license-header.sh
@@ -115,7 +115,7 @@ for file in $FILES; do
 		*.cmake|*.sh|*.ps1|*.py|*.rb|*.perl|*.pl|*.nix|*CMakeLists.txt)
 			begin="#"
 			;;
-		*.kt|*.kts|*.cpp|*.h|*.qml|*.c|*.hpp|*.hxx|*.cxx|*.h.in|*.inc)
+		*.kt|*.kts|*.cpp|*.h|*.qml|*.c|*.hpp|*.hxx|*.cxx|*.h.in|*.inc|*.mm)
 			begin="//"
 			;;
 		*)