diff --git a/Makefile b/Makefile
index a5f12de9928d459ba910e7e665ceb820bc990fb2..0aaf446eb971efa7ca3f7513a4b005037e7943cd 100644
--- a/Makefile
+++ b/Makefile
@@ -5,7 +5,7 @@
 # KUDU_OUTDIR should be commented out or changed to a writeable local directory as appropriate
 
 
-CFLAGS += -std=c99 -Wall -Werror -DLOG -DKUDU_OUTDIR="./"
+CFLAGS += -std=c99 -Wall -Werror -Wshadow -DLOG -DKUDU_OUTDIR="./"
 #CFLAGS += -std=c99 -Wall -Werror -DLOG
 
 HAMMER_INCLUDE = .