diff --git a/ci/run-check.sh b/ci/run-check.sh
index 167786a49f..0bc6dea814 100755
--- a/ci/run-check.sh
+++ b/ci/run-check.sh
@@ -22,7 +22,9 @@ case $TARGET in
     ;;
 
   lint-fmt)
-    cargo fmt -- --check
+    # We need the `+nightly` as long as the used toolchain is the stable version
+    # in order to allow using the formatter unstable options
+    cargo +nightly fmt -- --check
     ;;
 
   lint-taplo)