diff --git a/src/Mod/Import/App/AppImportPy.cpp b/src/Mod/Import/App/AppImportPy.cpp
index 119bfa268e..c202655f46 100644
--- a/src/Mod/Import/App/AppImportPy.cpp
+++ b/src/Mod/Import/App/AppImportPy.cpp
@@ -108,7 +108,7 @@ public:
             "export(list,string) -- Export a list of objects into a single file."
         );
          add_varargs_method("readDXF",&Module::readDXF,
-            "readDXF(filename,[document,ignore_errors]): Imports a DXF file into the given document. ignore_errors is True by default."
+            "readDXF(filename,[document,ignore_errors,option_source]): Imports a DXF file into the given document. ignore_errors is True by default."
         );
         add_varargs_method("writeDXFShape",&Module::writeDXFShape,
             "writeDXFShape([shape],filename [version,usePolyline,optionSource]): Exports Shape(s) to a DXF file."