diff --git a/tests/server/Makefile b/tests/server/Makefile
index f093bd6c67..01ecfba021 100644
--- a/tests/server/Makefile
+++ b/tests/server/Makefile
@@ -1,5 +1,5 @@
 CC	= gcc
-CFLAGS	= -g -Wall
+CFLAGS	= -g -Wall -W
 
 .PHONY: all clean