diff --git a/bin/Makefile b/bin/Makefile
index b807117..429fea1 100644
--- a/bin/Makefile
+++ b/bin/Makefile
@@ -26,7 +26,7 @@ CVORBIS =
 CGL  =
 CFLAGS = $(CLUA) $(CPLUTO) $(CSDL) $(CXML) $(CTTF) $(CGL) $(CAL) $(CVORBIS) $(VERSION) -D$(OS) -fgnu89-inline
 ifdef DEBUG
-CFLAGS += -W -Wall -g3 -DDEBUG -DLUA_USE_APICHECK -std=c99
+CFLAGS += -W -Wall -Wextra -g3 -DDEBUG -DLUA_USE_APICHECK -std=c99
 else
 CFLAGS += -O2 -funroll-loops -pipe -std=c99
 endif