diff --git a/common.mk b/common.mk
index f6119f9510..2c9f705ce2 100644
--- a/common.mk
+++ b/common.mk
@@ -989,7 +989,7 @@ $(srcdir)/revision.h:
 	@exit > $@
 
 $(REVISION_H): $(srcdir)/version.h $(srcdir)/tool/file2lastrev.rb $(REVISION_FORCE)
-	-$(Q) $(BASERUBY) $(srcdir)/tool/file2lastrev.rb -q --revision.h "$(srcdir)" > revision.tmp
+	$(Q) $(BASERUBY) $(srcdir)/tool/file2lastrev.rb -q --revision.h "$(srcdir)" > revision.tmp
 	$(Q)$(IFCHANGE) "--timestamp=$@" "$(srcdir)/revision.h" revision.tmp
 
 $(srcdir)/ext/ripper/ripper.c: $(srcdir)/parse.y id.h
diff --git a/tool/file2lastrev.rb b/tool/file2lastrev.rb
index ee615a5060..8d68da9f88 100755
--- a/tool/file2lastrev.rb
+++ b/tool/file2lastrev.rb
@@ -89,7 +89,8 @@ else
     begin
       puts @output[*vcs.get_revisions(arg)]
     rescue => e
-      warn "#{File.basename(Program)}: #{e.message}" unless @suppress_not_found
+      next if @suppress_not_found and VCS::NotFoundError === e
+      warn "#{File.basename(Program)}: #{e.message}"
       ok = false
     end
   end