diff --git a/GNG.py b/GNG.py
index 8cd3a73..4907df1 100644
--- a/GNG.py
+++ b/GNG.py
@@ -92,9 +92,9 @@ def resetForm(self):
         self.progressBar.setValue(0)
 
     def generateGNG(self):
-        if self.regionPath.text() is not "":
+        if self.regionPath.text() != "":
             readRegion(self.regionPath.text(), self.ICAO.text())
-        if self.geoPath.text() is not "":
+        if self.geoPath.text() != "":
             readGEO(self.geoPath.text(), self.ICAO.text())
         self.progressBar.setValue(100)