diff --git a/include/wlr/types/wlr_cursor.h b/include/wlr/types/wlr_cursor.h
index fc541271..0883f3ca 100644
--- a/include/wlr/types/wlr_cursor.h
+++ b/include/wlr/types/wlr_cursor.h
@@ -155,7 +155,7 @@ void wlr_cursor_map_input_to_region(struct wlr_cursor *cur,
  * Convert absolute coordinates to layout coordinates for the device.
  */
 bool wlr_cursor_absolute_to_layout_coords(struct wlr_cursor *cur,
-		struct wlr_input_device *device, double x_mm, double y_mm,
+		struct wlr_input_device *device, double x, double y,
 		double *lx, double *ly);
 
 #endif