diff --git a/examples/example1.py b/examples/example1.py
index 004c2d7..f1337e0 100644
--- a/examples/example1.py
+++ b/examples/example1.py
@@ -95,8 +95,8 @@
     ylabel('$\\phi$ / rad')
     grid()
     lines = l0 + l1 + l2 + l3
-    labels = [l.get_label() for l in lines]
+    labels = [line.get_label() for line in lines]
     legend(lines, labels)
     xlabel('Frequency $f$ / Hz')
 
-show()
\ No newline at end of file
+show()