diff --git a/tools/format-all.sh b/tools/format-all.sh
index f5d73eb93..0d90f377f 100755
--- a/tools/format-all.sh
+++ b/tools/format-all.sh
@@ -6,8 +6,5 @@
 # SPDX-FileCopyrightText: 2014-2023 Institute for Automation of Complex Power Systems, RWTH Aachen University
 # SPDX-License-Identifier: Apache-2.0
 
-TOP_DIR=$(git rev-parse --show-toplevel)
-
-find ${TOP_DIR} \( -iname "*.cpp" -o -iname "*.hpp" -o -iname "*.h" -o -iname "*.c" \) -a \
-                -not \( -path "${TOP_DIR}/fpga/thirdparty/*" -o -path "${TOP_DIR}/build*/*" \) | \
-    xargs clang-format --verbose -i
+git ls-files -c -z -- "*.c" ".h" "*.hpp" "*.cpp" ":!:fpga/thirdparty" |\
+    xargs -0 clang-format --verbose -i