diff --git a/plug-ins/python/gradients-save-as-css.py b/plug-ins/python/gradients-save-as-css.py
index 2d1fc82d40..df0c6685c4 100755
--- a/plug-ins/python/gradients-save-as-css.py
+++ b/plug-ins/python/gradients-save-as-css.py
@@ -203,7 +203,7 @@ class GradientsSaveAsCSS (Gimp.PlugIn):
                                          Gimp.RunMode.NONINTERACTIVE,
                                          GObject.ParamFlags.READWRITE)
             procedure.add_gradient_argument ("gradient", _("_Gradient to use"),
-                                             "", GObject.ParamFlags.READWRITE)
+                                             "", False, GObject.ParamFlags.READWRITE)
             procedure.add_file_argument ("file", _("_File"),
                                          "", GObject.ParamFlags.READWRITE)
         return procedure
diff --git a/plug-ins/python/palette-offset.py b/plug-ins/python/palette-offset.py
index c5048fbed4..cd4c4cc4a1 100644
--- a/plug-ins/python/palette-offset.py
+++ b/plug-ins/python/palette-offset.py
@@ -57,7 +57,7 @@ class PaletteOffset (Gimp.PlugIn):
                                          Gimp.RunMode.NONINTERACTIVE,
                                          GObject.ParamFlags.READWRITE)
             procedure.add_palette_argument ("palette", _("_Palette"),
-                                            _("Palette"),
+                                            _("Palette"), False,
                                             GObject.ParamFlags.READWRITE)
             procedure.add_int_argument ("amount", _("O_ffset"), _("Offset"),
                                         1, GLib.MAXINT, 1, GObject.ParamFlags.READWRITE)
diff --git a/plug-ins/python/palette-sort.py b/plug-ins/python/palette-sort.py
index a017f1bbca..85d054f479 100755
--- a/plug-ins/python/palette-sort.py
+++ b/plug-ins/python/palette-sort.py
@@ -356,7 +356,7 @@ class PaletteSort (Gimp.PlugIn):
                                          Gimp.RunMode.INTERACTIVE,
                                          GObject.ParamFlags.READWRITE)
             procedure.add_palette_argument ("palette", _("_Palette"),
-                                            _("Palette"),
+                                            _("Palette"), False,
                                             GObject.ParamFlags.READWRITE)
 
             selection_choice = Gimp.Choice.new()
diff --git a/plug-ins/python/palette-to-gradient.py b/plug-ins/python/palette-to-gradient.py
index 0f5cb1ca2f..2bf956310f 100644
--- a/plug-ins/python/palette-to-gradient.py
+++ b/plug-ins/python/palette-to-gradient.py
@@ -145,7 +145,7 @@ class PaletteToGradient (Gimp.PlugIn):
                                          Gimp.RunMode.NONINTERACTIVE,
                                          GObject.ParamFlags.READWRITE)
             procedure.add_palette_argument ("palette", _("_Palette"),
-                                            _("Palette"),
+                                            _("Palette"), False,
                                             GObject.ParamFlags.READWRITE)
             procedure.add_gradient_return_value ("new-gradient", _("The newly created gradient"),
                                                  _("The newly created gradient"),
diff --git a/plug-ins/python/test-dialog.py b/plug-ins/python/test-dialog.py
index 3f2300de3e..d726b69e4c 100644
--- a/plug-ins/python/test-dialog.py
+++ b/plug-ins/python/test-dialog.py
@@ -152,18 +152,18 @@ class TestDialogPlugin (Gimp.PlugIn):
         # Top level menu "Test"
         procedure.add_menu_path ("<Image>/Filters/Development/Demos")
 
-        procedure.add_brush_argument ("brush", "_Brush", "Brush",
+        procedure.add_brush_argument ("brush", "_Brush", "Brush", True,
                                       GObject.ParamFlags.READWRITE)
-        procedure.add_font_argument ("font", "_Font", "Font",
+        procedure.add_font_argument ("font", "_Font", "Font", True,
                                      GObject.ParamFlags.READWRITE)
         procedure.add_gradient_argument ("gradient", "_Gradient",
-                                         "Gradient",
+                                         "Gradient", True,
                                          GObject.ParamFlags.READWRITE)
         procedure.add_palette_argument ("palette", "_Palette",
-                                        "Palette",
+                                        "Palette", True,
                                         GObject.ParamFlags.READWRITE)
         procedure.add_pattern_argument ("pattern", "Pa_ttern",
-                                        "Pattern",
+                                        "Pattern", True,
                                         GObject.ParamFlags.READWRITE)
 
         return procedure