diff --git a/Makefile b/Makefile
index 8fa9fdf7e..0afa377a8 100644
--- a/Makefile
+++ b/Makefile
@@ -177,7 +177,11 @@ CXXFLAGS += $(WARNING_FLAGS) -I. -I./include $(PLATFORM_CXXFLAGS) $(OPT) -Woverl
 LDFLAGS += $(PLATFORM_LDFLAGS)
 
 date := $(shell date +%F)
-git_sha := $(shell git rev-parse HEAD 2>/dev/null)
+ifdef FORCE_GIT_SHA
+	git_sha := $(FORCE_GIT_SHA)
+else
+	git_sha := $(shell git rev-parse HEAD 2>/dev/null)
+endif
 gen_build_version =							\
   printf '%s\n'								\
     '\#include "build_version.h"'					\