diff --git a/Makefile b/Makefile
index 2a781788ef03619e4cd889c9c51fa0ba0e459413..803bd85330ee6525536d949813cc354a580c7d6b 100644
--- a/Makefile
+++ b/Makefile
@@ -1,6 +1,5 @@
 REDIS_RB_VERSION=v3.3.0
 REDIS_RB_VENDOR_DIR=lib/vendor/redis
-PWD=`pwd`
 
 all:
 
@@ -9,4 +8,4 @@ update-redis:
 	git clone -b $(REDIS_RB_VERSION) https://github.com/redis/redis-rb.git $(REDIS_RB_VENDOR_DIR)
 	rm -rf $(REDIS_RB_VENDOR_DIR)/.git
 
-.PHONY=update-redis
+.PHONY: update-redis