diff --git a/Makefile b/Makefile
index 0719f302a..7f4aa7bf3 100644
--- a/Makefile
+++ b/Makefile
@@ -182,7 +182,7 @@ well-known: static;
 --start-hoogle-backend:
 	HOOGLE_PORT=`cat $(CONTAINER_FILE) | grep 'HOOGLE_PORT=' | sed 's/HOOGLE_PORT=//'` ; \
 	echo "${HOOGLE_PORT}" ; \
-	stack --work-dir .stack-work-doc hoogle -- -server --local --port $${HOOGLE_PORT}
+	stack --work-dir=.stack-work-doc hoogle -- server --local --port $${HOOGLE_PORT}
 
 # HELP(compile-backend): compile backend
 --compile-backend: