diff --git a/go.mod b/go.mod
index beb3406b24ae..e462c31ffa76 100644
--- a/go.mod
+++ b/go.mod
@@ -496,4 +496,6 @@ replace golang.org/x/time => github.com/cockroachdb/x-time v0.3.1-0.202305251236
 replace github.com/gogo/protobuf => github.com/cockroachdb/gogoproto v1.3.3-0.20241118145159-46874edb1b83
 
 // See https://github.com/cockroachdb/cockroach/issues/136367.
+// We must use the noalpncheck version of grpc-go until the MinSupportedVersion
+// also uses gRPC at v1.68.0 or above.
 replace google.golang.org/grpc v1.68.0 => github.com/cockroachdb/grpc-go v1.68.0-noalpncheck