diff --git a/source/Stack.cpp b/source/Stack.cpp
index 27eb2e0..dd73f6e 100644
--- a/source/Stack.cpp
+++ b/source/Stack.cpp
@@ -94,6 +94,7 @@ void Stack::saveWeights()
 	while(pLayer)
 	{
 		pLayer->saveWeights();
+		pLayer = pLayer->upper;
 	}
 }