diff --git a/consensus/proto_array/src/proto_array.rs b/consensus/proto_array/src/proto_array.rs
index 6cb10e3d204..7b6afb94f54 100644
--- a/consensus/proto_array/src/proto_array.rs
+++ b/consensus/proto_array/src/proto_array.rs
@@ -884,7 +884,7 @@ impl ProtoArray {
                         }
                     } else {
                         // Choose the winner by weight.
-                        if child.weight >= best_child.weight {
+                        if child.weight > best_child.weight {
                             change_to_child
                         } else {
                             no_change