diff --git a/ui/ceval/src/stockfishProtocol.ts b/ui/ceval/src/stockfishProtocol.ts
index d4d5c56d28..8cd8d66fd7 100644
--- a/ui/ceval/src/stockfishProtocol.ts
+++ b/ui/ceval/src/stockfishProtocol.ts
@@ -64,6 +64,9 @@ export default class Protocol {
         elapsedMs: number = parseInt(matches[7]),
         moves = matches[8].split(' ');
 
+    // Sometimes we get #0. Let's just skip it.
+    if (isMate && !ev) return;
+
     // Track max pv index to determine when pv prints are done.
     if (this.expectedPvs < multiPv) this.expectedPvs = multiPv;