diff --git a/drivers/staging/greybus/Makefile b/drivers/staging/greybus/Makefile
index b254516b4392..81174b936b3a 100644
--- a/drivers/staging/greybus/Makefile
+++ b/drivers/staging/greybus/Makefile
@@ -23,6 +23,9 @@ KERNELVER		?= $(shell uname -r)
 KERNELDIR 		?= /lib/modules/$(KERNELVER)/build
 PWD			:= $(shell pwd)
 
+# add -Wall to try to catch everything we can.
+ccFlags-y := -Wall
+
 all: module
 
 module: