diff --git a/release/scripts/ui/space_text.py b/release/scripts/ui/space_text.py
index 1eca1a9e05c..692f1581bd6 100644
--- a/release/scripts/ui/space_text.py
+++ b/release/scripts/ui/space_text.py
@@ -54,6 +54,9 @@ class TEXT_HT_header(bpy.types.Header):
         if text:
             row = layout.row()
             row.operator("text.run_script")
+
+            row = layout.row()
+            row.active = text.name.endswith(".py")
             row.prop(text, "use_module")
 
             row = layout.row()
@@ -63,10 +66,7 @@ class TEXT_HT_header(bpy.types.Header):
                 else:
                     row.label(text="File: %s" % text.filepath)
             else:
-                if text.library:
-                    row.label(text="Text: External")
-                else:
-                    row.label(text="Text: Internal")
+                row.label(text="Text: External" if text.library else "Text: Internal")
 
 
 class TEXT_PT_properties(bpy.types.Panel):
diff --git a/source/blender/makesrna/intern/rna_text.c b/source/blender/makesrna/intern/rna_text.c
index ccd3b432163..d8651e5d05d 100644
--- a/source/blender/makesrna/intern/rna_text.c
+++ b/source/blender/makesrna/intern/rna_text.c
@@ -195,7 +195,7 @@ static void rna_def_text(BlenderRNA *brna)
 	
 	prop= RNA_def_property(srna, "use_module", PROP_BOOLEAN, PROP_NONE);
 	RNA_def_property_boolean_sdna(prop, NULL, "flags", TXT_ISSCRIPT);
-	RNA_def_property_ui_text(prop, "Register", "Register this text as a module on loading");
+	RNA_def_property_ui_text(prop, "Register", "Register this text as a module on loading, Text name must end with \".py\"");
 
 	prop= RNA_def_property(srna, "tabs_as_spaces", PROP_BOOLEAN, PROP_NONE);
 	RNA_def_property_boolean_sdna(prop, NULL, "flags", TXT_TABSTOSPACES);