diff --git a/src/openalpr/postprocess.cpp b/src/openalpr/postprocess.cpp
index 3a16a37..77e2195 100644
--- a/src/openalpr/postprocess.cpp
+++ b/src/openalpr/postprocess.cpp
@@ -357,10 +357,11 @@ vector<int> PostProcess::getMaxDepth(int topn)
   int nextLeastDropCharPos = getNextLeastDrop(depth);
   while (nextLeastDropCharPos != -1)
   {
-    depth[nextLeastDropCharPos] = depth[nextLeastDropCharPos] + 1;
-    if (getPermutationCount(depth) > topn)
+    if (getPermutationCount(depth) >= topn)
       break;
     
+    depth[nextLeastDropCharPos] = depth[nextLeastDropCharPos] + 1;
+    
     nextLeastDropCharPos = getNextLeastDrop(depth);
   }