diff --git a/lib/matplotlib/projections/geo.py b/lib/matplotlib/projections/geo.py
index 338deec8279..03c25cf4f89 100644
--- a/lib/matplotlib/projections/geo.py
+++ b/lib/matplotlib/projections/geo.py
@@ -194,7 +194,6 @@ def set_longitude_grid(self, degrees):
         self.xaxis.set_major_locator(
             FixedLocator(
                 np.linspace(-np.pi, np.pi, number, True)[1:-1]))
-        self._logitude_degrees = degrees
         self.xaxis.set_major_formatter(self.ThetaFormatter(degrees))
 
     def set_latitude_grid(self, degrees):