diff --git a/src/Makefile b/src/Makefile
index 6a8c6a88e9218ac98e10587aa3eec61614f3f719..8b3e959890b5e026a5636edb54ea90bbb4a7cb88 100644
--- a/src/Makefile
+++ b/src/Makefile
@@ -19,7 +19,7 @@ DEPENDENCY_TARGETS=hiredis linenoise lua
 
 # Default settings
 STD=-std=c99 -pedantic
-WARN=-Wall
+WARN=-Wall -W
 OPT=$(OPTIMIZATION)
 
 PREFIX?=/usr/local