diff --git a/src/Arduboy2.h b/src/Arduboy2.h
index 735e592..a569a6b 100644
--- a/src/Arduboy2.h
+++ b/src/Arduboy2.h
@@ -1027,7 +1027,7 @@ class Arduboy2Base : public Arduboy2Core
    *
    * \see Point Rect
    */
-  bool collide(Point point, Rect rect);
+  static bool collide(Point point, Rect rect);
 
   /** \brief
    * Test if a rectangle is intersecting with another rectangle.
@@ -1044,7 +1044,7 @@ class Arduboy2Base : public Arduboy2Core
    *
    * \see Rect
    */
-  bool collide(Rect rect1, Rect rect2);
+  static bool collide(Rect rect1, Rect rect2);
 
   /** \brief
    * Read the unit ID from system EEPROM.