diff --git a/tests/ghc_ghci/Makefile b/tests/ghc_ghci/Makefile
index 335fb9d7805789db1b9cf0d1f156e4bcef03f956..6bb23839c6d18379c09c836c1c031ddd6ec4a25a 100644
--- a/tests/ghc_ghci/Makefile
+++ b/tests/ghc_ghci/Makefile
@@ -8,6 +8,6 @@ include $(TOP)/mk/test.mk
 
 hpc_ghc_ghci:
 	rm -f A.o A.hi
-	$(TEST_HC) -fhpc -c A.hs
-	echo b | $(TEST_HC) -v0 --interactive B.hs
+	'$(TEST_HC)' -fhpc -c A.hs
+	echo b | '$(TEST_HC)' -v0 --interactive B.hs