diff --git a/src/Makefile.am b/src/Makefile.am
index 586b89b..3b1357b 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -100,7 +100,7 @@ libdivecomputer.lo: revision.h
 
 FORCE:
 $(top_srcdir)/revision: FORCE
-	@if (test -d $(top_srcdir)/.git && cd $(top_srcdir) \
+	@if (test -e $(top_srcdir)/.git && cd $(top_srcdir) \
 	     && git rev-parse --verify HEAD) > revision-t 2>/dev/null \
 	  && ! cmp -s revision-t $@; then \
 	  mv -f revision-t $@; \