diff --git a/src/interface.jl b/src/interface.jl
index 84b9ae1..be40b2c 100644
--- a/src/interface.jl
+++ b/src/interface.jl
@@ -84,10 +84,8 @@ function runMCTS(
       backpropagate(leafNode, simTrajectoryReward)
     end
 
-    # stop if the tree early stop condition is met
-    if typeof(earlystop) <: Function
-      result = earlystop(node.state)
-
+    # stop if the early stop condition is met
+    if typeof(earlystop) <: Function && earlystop(node.state)
       break
     end
   end