diff --git a/Makefile b/Makefile
index 97527f0b..5ed10d84 100644
--- a/Makefile
+++ b/Makefile
@@ -27,7 +27,8 @@ VPATH = $(TOPSRC)
 TCC_GIT_HASH=$(shell git rev-parse > /dev/null 2>&1 && git rev-parse --short HEAD || echo no)
 
 ifneq ($(TCC_GIT_HASH),no)
- CFLAGS += -DTCC_GIT_HASH="\"$(TCC_GIT_HASH)\""
+ MODIFIED = $(shell git diff | grep --quiet +++ && echo "modified ")
+ CFLAGS += -DTCC_GIT_HASH="\"$(MODIFIED)$(TCC_GIT_HASH)\""
 endif
 
 ifdef CONFIG_WIN32