diff --git a/release/scripts/startup/bl_operators/wm.py b/release/scripts/startup/bl_operators/wm.py
index 2b8664882b7..59abff12834 100644
--- a/release/scripts/startup/bl_operators/wm.py
+++ b/release/scripts/startup/bl_operators/wm.py
@@ -1378,7 +1378,7 @@ class WM_OT_properties_edit(Operator):
             return {'CANCELLED'}
 
         # retrieve overridable static
-        is_overridable = item.is_property_overridable_library(f'["{self.property}"]')
+        is_overridable = item.is_property_overridable_library('["%s"]' % self.property)
         self.is_overridable_library = bool(is_overridable)
 
 
diff --git a/release/scripts/startup/nodeitems_builtins.py b/release/scripts/startup/nodeitems_builtins.py
index f62c2ead144..0cf0a99c326 100644
--- a/release/scripts/startup/nodeitems_builtins.py
+++ b/release/scripts/startup/nodeitems_builtins.py
@@ -478,7 +478,7 @@ texture_node_categories = [
 def not_implemented_node(idname):
     NodeType = getattr(bpy.types, idname)
     name = NodeType.bl_rna.name
-    label = f"{name} (mockup)"
+    label = "%s (mockup)" % name
     return NodeItem(idname, label=label)
 
 simulation_node_categories = [