diff --git a/HW10/MakePermutationMatrix.cpp b/HW10/MakePermutationMatrix.cpp
index 5cefa28..d8173e3 100644
--- a/HW10/MakePermutationMatrix.cpp
+++ b/HW10/MakePermutationMatrix.cpp
@@ -20,7 +20,7 @@ std::vector<double> MakePermutationMatrix::MakePermutation(std::vector<City> sou
     returnVector.resize(source.size(), 0);
 
     //the "nextPerm" is the permutation to stop at.
-    if(rank != size)
+    if(rank != size-1)
         std::rotate(nextPerm.begin(), nextPerm.begin() + (rank + 1 + vectorOffset), nextPerm.end());
 
     std::partial_sort(nextPerm.begin()+1, nextPerm.end(), nextPerm.end());