diff --git a/Eigen/src/SparseCore/SparseMatrix.h b/Eigen/src/SparseCore/SparseMatrix.h
index de4d36840..b4ed27e9b 100644
--- a/Eigen/src/SparseCore/SparseMatrix.h
+++ b/Eigen/src/SparseCore/SparseMatrix.h
@@ -679,7 +679,7 @@ class SparseMatrix
       {
         swap(other.const_cast_derived());
       }
-      else
+      else if(this!=&other)
       {
         initAssignment(other);
         if(other.isCompressed())