diff --git a/modules/objdetect/src/cascadedetect.cpp b/modules/objdetect/src/cascadedetect.cpp
index 0b7868a1d1..9b21f196a3 100644
--- a/modules/objdetect/src/cascadedetect.cpp
+++ b/modules/objdetect/src/cascadedetect.cpp
@@ -64,7 +64,7 @@ void groupRectangles(std::vector<Rect>& rectList, int groupThreshold, double eps
 
     if( groupThreshold <= 0 || rectList.empty() )
     {
-        if( weights )
+        if( weights && !levelWeights )
         {
             size_t i, sz = rectList.size();
             weights->resize(sz);