diff --git a/SpMat.h b/SpMat.h
index 72da5f14d9960df533f99c9097397cf440f29cdb..682897f469ff97dcfd775b90cf6c6121ff8a5b0a 100644
--- a/SpMat.h
+++ b/SpMat.h
@@ -164,7 +164,7 @@ public:
     }
     ~ColumnIterator() {}
     T operator*() const { return(*_val_it); }
-    unsigned int Row() const { return(*_ri_it); }
+    unsigned int Row() const { return((*_ri_it)+1); }
     bool operator==(const ColumnIterator& rhs) const { return(_val_it == rhs._val_it); }
     bool operator!=(const ColumnIterator& rhs) const { return(!(*this == rhs)); }
     // Prefix increment. Use whenever possible