diff --git a/Makefile b/Makefile
index 2cae4f8..e18d2d3 100644
--- a/Makefile
+++ b/Makefile
@@ -4,7 +4,7 @@ SWFS = $(patsubst %.mxml,%.swf,$(wildcard [0-9]*-*/*.mxml))
 
 
 %.swf : %.mxml
-	$(MXMLC) $< -output $@
+	$(MXMLC) $< -warnings -output $@
 
 
 all: $(SWFS)