diff --git a/lib/Value/Matrix.pm b/lib/Value/Matrix.pm
index 5b1892cdd..4be307808 100644
--- a/lib/Value/Matrix.pm
+++ b/lib/Value/Matrix.pm
@@ -621,7 +621,7 @@ sub isRREF {
 		}
 	} else {
 		for my $row (@{ $self->{data} }) {
-			return 0 unless $row->isREF;
+			return 0 unless $row->isRREF;
 		}
 	}
 	return 1;