diff --git a/Makefile.coq.local b/Makefile.coq.local
index 9eed36a6f5380530ace4634cc910f3f099548f2c..0c66b18a155dcf3d0b7d34a5d778c991ca97dab1 100644
--- a/Makefile.coq.local
+++ b/Makefile.coq.local
@@ -8,7 +8,7 @@ test: $(TESTFILES:.v=.vo)
 .PHONY: test
 
 COQ_TEST=$(COQTOP) $(COQDEBUG) -batch -test-mode
-COQ_OLD=$(shell echo "$(COQ_VERSION)" | egrep "^8\.(7|10)\b" > /dev/null && echo 1)
+COQ_OLD=$(shell echo "$(COQ_VERSION)" | egrep "^8\.7\b" -q && echo 1)
 COQ_MINOR_VERSION=$(shell echo "$(COQ_VERSION)" | egrep '^[0-9]+\.[0-9]+\b' -o)
 
 # Can't use pipes because that discards error codes and dash provides no way to control that.