diff --git a/Makefile b/Makefile
index 46c822012e..dd2bf5ca37 100644
--- a/Makefile
+++ b/Makefile
@@ -139,7 +139,7 @@ endif
 
 REVISION := norevision
 ifeq ($(shell git diff --shortstat),)
-REVISION := $(shell git log -1 --format="%h")
+REVISION := $(shell git log -1 --format="%h" | head -c 7)
 endif
 
 LD_FLAGS        :=