diff --git a/src/t_stream.c b/src/t_stream.c
index 16817c21..43d3e4da 100644
--- a/src/t_stream.c
+++ b/src/t_stream.c
@@ -2138,7 +2138,8 @@ void xclaimCommand(client *c) {
     for (int j = 5; j <= last_id_arg; j++) {
         streamID id;
         unsigned char buf[sizeof(streamID)];
-        if (streamParseStrictIDOrReply(c,c->argv[j],&id,0) != C_OK) return;
+        if (streamParseStrictIDOrReply(c,c->argv[j],&id,0) != C_OK)
+            serverPanic("StreamID invalid after check. Should not be possible.");
         streamEncodeID(buf,&id);
 
         /* Lookup the ID in the group PEL. */