diff --git a/gui/wxpython/vdigit/wxdisplay.py b/gui/wxpython/vdigit/wxdisplay.py
index 727d18055a0..f3aca2c6a61 100644
--- a/gui/wxpython/vdigit/wxdisplay.py
+++ b/gui/wxpython/vdigit/wxdisplay.py
@@ -856,7 +856,7 @@ def GetSelectedVertex(self, pos):
 
         if not self._validLine(line):
             return -1
-        Vect_read_line(poMapInfo, self.poPoints, self.poCats, lineNearest)
+        Vect_read_line(poMapInfo, self.poPoints, self.poCats, line)
 
         minDist = 0.0
         Gid = -1