diff --git a/pcbnew/exporters/gendrill_gerber_writer.cpp b/pcbnew/exporters/gendrill_gerber_writer.cpp
index 6d412dbc72..8fcf44a7cb 100644
--- a/pcbnew/exporters/gendrill_gerber_writer.cpp
+++ b/pcbnew/exporters/gendrill_gerber_writer.cpp
@@ -207,11 +207,15 @@ int GERBER_WRITER::createDrillFile( wxString& aFullFilename, bool aIsNpth,
 
     // else: empty file.
 
-    // End of attribute:
+    // End of .FileFunction attribute:
     text << "*%";
 
     plotter.AddLineToHeader( text );
 
+    // Add file polarity (positive)
+    text = "%TF.FilePolarity,Positive*%";
+    plotter.AddLineToHeader( text );
+
     if( !plotter.OpenFile( aFullFilename ) )
         return -1;