diff --git a/src/opt/maxres.cpp b/src/opt/maxres.cpp
index 178b87037..f0345232d 100644
--- a/src/opt/maxres.cpp
+++ b/src/opt/maxres.cpp
@@ -718,7 +718,7 @@ public:
             }
         }
 
-        if (upper >= m_upper) {
+        if (upper > m_upper) {
             return;
         }