diff --git a/Makefile b/Makefile
index da773483..c78e24e2 100644
--- a/Makefile
+++ b/Makefile
@@ -219,7 +219,7 @@ check-for-missing-rpc-summaries:
 ## Make sure the Quick Reference section has a summary for each RPC we
 ## have documented
 	$S for f in _includes/devdoc/dash-core/rpcs/rpcs/*.md ;\
-	do grep -q "\[$$( grep '^##### ' $$f | sed 's/^##### *\([a-zA-Z]*\).*/\1/')\]\[" _includes/devdoc/dash-core/rpcs/quick-reference.md \
+	do grep -q "\[$$( grep '^##### ' $$f | sed 's/^##### *\([a-zA-Z0-9]*\).*/\1/')\]\[" _includes/devdoc/dash-core/rpcs/quick-reference.md \
 	|| echo 'missing summary for '$$f', you need to add the summary to _includes/devdoc/dash-core/rpcs/quick-ref.md and run make manual-updates' \
 	; done | eval $(ERROR_ON_OUTPUT)