diff --git a/dlx/__init__.py b/dlx/__init__.py
index f52a5a8..b5c4ce1 100644
--- a/dlx/__init__.py
+++ b/dlx/__init__.py
@@ -131,7 +131,7 @@ def appendRow(self, row, rowName=None):
             self.L[self.R[self.nodect]] = self.nodect
 
             self.N.append(rowName)
-            self.prev = self.nodect
+            prev = self.nodect
             self.nodect += 1
         return first