diff --git a/regression_test/makefilegen/Makefile b/regression_test/makefilegen/Makefile
index f70ae841d8b2046cd824d51adf8c6054fd516a9a..15765e27e534398630d3ece155b3f4f3e7830fcc 100644
--- a/regression_test/makefilegen/Makefile
+++ b/regression_test/makefilegen/Makefile
@@ -26,6 +26,6 @@ split:
 run: envvar split
 
 clean distclean:
-	rm TempMakefile
+	rm -f TempMakefile
 
 dep: