diff --git a/app/pdb/text-layer-cmds.c b/app/pdb/text-layer-cmds.c
index dc8e0f5cb1..423bce0585 100644
--- a/app/pdb/text-layer-cmds.c
+++ b/app/pdb/text-layer-cmds.c
@@ -1308,7 +1308,7 @@ register_text_layer_procs (GimpPDB *pdb)
                                gimp_param_spec_unit ("unit",
                                                      "unit",
                                                      "The unit to use for the font size",
-                                                     FALSE,
+                                                     TRUE,
                                                      FALSE,
                                                      gimp_unit_inch (),
                                                      GIMP_PARAM_READWRITE));
diff --git a/pdb/groups/text_layer.pdb b/pdb/groups/text_layer.pdb
index 8094790f32..f3b288dcd0 100644
--- a/pdb/groups/text_layer.pdb
+++ b/pdb/groups/text_layer.pdb
@@ -345,7 +345,7 @@ HELP
           desc => 'The text layer' },
         { name => 'font_size', type => '0.0 <= double <= 8192.0',
           desc => 'The font size' },
-        { name => 'unit', type => 'unit',
+        { name => 'unit', type => 'unit', allow_pixel => 1,
           desc => 'The unit to use for the font size' }
     );