diff --git a/src/Function3D.cpp b/src/Function3D.cpp
index f2b4ae3..7619c50 100644
--- a/src/Function3D.cpp
+++ b/src/Function3D.cpp
@@ -99,7 +99,7 @@ Matrix Aurora::size(const Matrix &aMatrix)
     else if (aMatrix.isVector()){
         double * output = Aurora::malloc(2);
         output[0]=aMatrix.getDimSize(0);
-        output[1]=aMatrix.getDimSize(0);
+        output[1]=aMatrix.getDimSize(1);
         return Matrix::New(output,2,1,1);
     }
     //3D