diff --git a/.githooks/pre-commit b/.githooks/pre-commit
index 63c3492..cb2d72e 100755
--- a/.githooks/pre-commit
+++ b/.githooks/pre-commit
@@ -3,7 +3,7 @@ set -e
 
 filesToFormat=$(
   git --no-pager diff --name-status --no-color --cached | \
-    awk '$1 != "D" && $2 ~ /\.c\|\.h/ {print $NF}'
+    awk '$1 != "D" && $2 ~ /\.c|\.h/ {print $NF}'
 )
 
 for path in $filesToFormat