diff --git a/packages/flame_forge2d/lib/forge2d_camera.dart b/packages/flame_forge2d/lib/forge2d_camera.dart
index 1706aa5fd0f..1a79c5e96fa 100644
--- a/packages/flame_forge2d/lib/forge2d_camera.dart
+++ b/packages/flame_forge2d/lib/forge2d_camera.dart
@@ -10,7 +10,7 @@ class Forge2DCamera extends Camera {
 
   @override
   Vector2 projectVector(Vector2 worldCoordinates) {
-    return ((worldCoordinates..y *= -1) - position)..scale(zoom);
+    return ((worldCoordinates.clone()..y *= -1) - position)..scale(zoom);
   }
 
   @override
diff --git a/packages/flame_forge2d/test/position_test.dart b/packages/flame_forge2d/test/position_test.dart
index 8a19a0c1b08..e0fd26c6945 100644
--- a/packages/flame_forge2d/test/position_test.dart
+++ b/packages/flame_forge2d/test/position_test.dart
@@ -15,4 +15,14 @@ void main() {
       });
     },
   );
+  group(
+    'Test input vector does not get modified while function call',
+    () {
+      test('Camera should not modify the input vector while projecting it', () {
+        final vec = Vector2(5, 6);
+        TestGame().camera.projectVector(vec);
+        expect(vec, Vector2(5, 6));
+      });
+    },
+  );
 }