diff --git a/test/Makefile.am b/test/Makefile.am
index db31738..f4dd05c 100644
--- a/test/Makefile.am
+++ b/test/Makefile.am
@@ -81,4 +81,4 @@
 AM_CPPFLAGS = $(BOOST_CPPFLAGS)
 
 clean-local:
-	rm -rf gen-cpp
+	$(RM) -r gen-cpp