diff --git a/format_sources b/format_sources
index 092ed7cc..8e5579a7 100644
--- a/format_sources
+++ b/format_sources
@@ -1 +1 @@
-*.cpp *.h: astyle --style=allman --indent=spaces=2 --pad-paren-in $TMPFILE
+*.cc *.cpp *.h: astyle --style=allman --indent=spaces=2 --pad-paren-in $TMPFILE