diff --git a/modules/mono/glue/GodotSharp/GodotSharp/Core/Rect2.cs b/modules/mono/glue/GodotSharp/GodotSharp/Core/Rect2.cs
index 91e614dc7b2..1098ffe4e5f 100644
--- a/modules/mono/glue/GodotSharp/GodotSharp/Core/Rect2.cs
+++ b/modules/mono/glue/GodotSharp/GodotSharp/Core/Rect2.cs
@@ -127,7 +127,7 @@ namespace Godot
         {
             var g = this;
 
-            g.GrowIndividual(Margin.Left == margin ? by : 0,
+            g = g.GrowIndividual(Margin.Left == margin ? by : 0,
                     Margin.Top == margin ? by : 0,
                     Margin.Right == margin ? by : 0,
                     Margin.Bottom == margin ? by : 0);
diff --git a/modules/mono/glue/GodotSharp/GodotSharp/Core/Rect2i.cs b/modules/mono/glue/GodotSharp/GodotSharp/Core/Rect2i.cs
index bc2cad87136..c0b236c524e 100644
--- a/modules/mono/glue/GodotSharp/GodotSharp/Core/Rect2i.cs
+++ b/modules/mono/glue/GodotSharp/GodotSharp/Core/Rect2i.cs
@@ -122,7 +122,7 @@ namespace Godot
         {
             var g = this;
 
-            g.GrowIndividual(Margin.Left == margin ? by : 0,
+            g = g.GrowIndividual(Margin.Left == margin ? by : 0,
                     Margin.Top == margin ? by : 0,
                     Margin.Right == margin ? by : 0,
                     Margin.Bottom == margin ? by : 0);