diff --git a/src/input/mouse.rs b/src/input/mouse.rs
index 7605ae1..895d56a 100644
--- a/src/input/mouse.rs
+++ b/src/input/mouse.rs
@@ -114,7 +114,7 @@ impl<'ui> Ui<'ui> {
     ///
     /// Clipped by current clipping settings, but disregards other factors like focus, window
     /// ordering, modal popup blocking.
-    pub fn is_mouse_hovering_rect(r_min: [f32; 2], r_max: [f32; 2]) -> bool {
+    pub fn is_mouse_hovering_rect(&self, r_min: [f32; 2], r_max: [f32; 2]) -> bool {
         unsafe { sys::igIsMouseHoveringRect(r_min.into(), r_max.into(), true) }
     }
     /// Returns the mouse position backed up at the time of opening a popup