diff --git a/src/diffpy/pdfgui/applications/pdfgui.py b/src/diffpy/pdfgui/applications/pdfgui.py
index 344d4719..348cbf27 100755
--- a/src/diffpy/pdfgui/applications/pdfgui.py
+++ b/src/diffpy/pdfgui/applications/pdfgui.py
@@ -101,7 +101,7 @@ def processArguments(argv1):
 
 
 def main():
-    '''Main entry point to  PDFgui.
+    '''Main entry point to PDFgui.
     '''
     # process arguments
     proceed = False