diff --git a/Matrix.h b/Matrix.h
index c8ed8ca..b9b9d18 100644
--- a/Matrix.h
+++ b/Matrix.h
@@ -28,9 +28,17 @@ public:
     // but the data size should be equal to avoid problems
     // We cannot check the data size directly, but the row*col should be equal
     unsigned int matrixSize = this->cols * this->rows;
-    if (matrixSize != r->rows * r->cols)
-      // Exception??? For now we don't do anything
+    unsigned int resultSize = r->rows * r->cols;
+    if (matrixSize != resultSize) {
+      // Return a null matrix;
+      // We dont set data to nullptr because it is allocated memory
+      // Instead we write all zeros
+      for (int dataIx = 0; dataIx < resultSize; dataIx++)
+        r->data[dataIx] = 0.0f;
+      r->rows = 0;
+      r->cols = 0;
       return;
+    }
 
     r->cols = this->rows;
     r->rows = this->cols;