diff --git a/skimage/viewer/plugins/lineprofile.py b/skimage/viewer/plugins/lineprofile.py
index af65f081..0d555eb5 100644
--- a/skimage/viewer/plugins/lineprofile.py
+++ b/skimage/viewer/plugins/lineprofile.py
@@ -107,7 +107,7 @@ class LineProfile(PlotPlugin):
         scan = profile_line(self.image_viewer.original_image, end_points,
                             linewidth=self.line_tool.linewidth)
 
-        if scan[1].shape != len(self.profile):
+        if scan.shape[1] != len(self.profile):
             self.reset_axes(scan)
 
         for i in range(len(scan[0])):