diff --git a/Makefile b/Makefile
index 0a61fe65..aba77753 100644
--- a/Makefile
+++ b/Makefile
@@ -72,7 +72,7 @@ else
 	LDLIBS += -lrt
 endif
 
-YOSYS_VER := 0.7
+YOSYS_VER := 0.7+$(shell cd $(YOSYS_SRC) && test -e .git && { git log --author=clifford@clifford.at --oneline 61f6811.. | wc -l; })
 GIT_REV := $(shell cd $(YOSYS_SRC) && git rev-parse --short HEAD 2> /dev/null || echo UNKNOWN)
 OBJS = kernel/version_$(GIT_REV).o