diff --git a/validator_client/slashing_protection/Makefile b/validator_client/slashing_protection/Makefile
index bab2155abc7..5abb6c0a492 100644
--- a/validator_client/slashing_protection/Makefile
+++ b/validator_client/slashing_protection/Makefile
@@ -5,7 +5,7 @@ TARBALL := $(OUTPUT_DIR)-$(TESTS_TAG).tar.gz
 ARCHIVE_URL := https://github.com/eth2-clients/slashing-protection-interchange-tests/tarball/$(TESTS_TAG)
 
 $(OUTPUT_DIR): $(TARBALL)
-	rm -r $@
+	rm -rf $@
 	mkdir $@
 	tar --strip-components=1 -xzf $^ -C $@