diff --git a/Makefile b/Makefile
index b5c5516..21d6189 100644
--- a/Makefile
+++ b/Makefile
@@ -150,6 +150,7 @@ WARNINGS += -Wstrict-prototypes
 WARNINGS += -Wundef
 WARNINGS += -Wvolatile-register-var
 WARNINGS += -Wwrite-strings
+WARNINGS += -Wunused-result
 
 CFLAGS	+= $(WARNINGS)