diff --git a/src/ReportBase/_GraphvizReportDialog.py b/src/ReportBase/_GraphvizReportDialog.py
index b2590ba14..f5c072ca1 100644
--- a/src/ReportBase/_GraphvizReportDialog.py
+++ b/src/ReportBase/_GraphvizReportDialog.py
@@ -1091,7 +1091,7 @@ class GraphvizReportDialog(ReportDialog):
             ext = ""
         else:
             spath = self.get_default_directory()
-            base = "%s.%s" % (self.raw_name, ext)
+            base = "%s%s" % (self.raw_name, ext)
             spath = os.path.normpath(os.path.join(spath, base))
             self.target_fileentry.set_filename(spath)