diff --git a/minuitwrp/minui.h b/minuitwrp/minui.h
index 2c462e7..a6c2a71 100644
--- a/minuitwrp/minui.h
+++ b/minuitwrp/minui.h
@@ -76,16 +76,9 @@
 
 // Transform minuitwrp API coordinates into display coordinates,
 // for panels that are hardware-mounted in a rotated manner.
-#define ROTATION_X_DISP(x, y, surface) \
-    ((TW_ROTATION ==   0) ? (x) : \
-     (TW_ROTATION ==  90) ? ((surface)->width - (y) - 1) : \
-     (TW_ROTATION == 180) ? ((surface)->width - (x) - 1) : \
-     (TW_ROTATION == 270) ? (y) : -1)
-#define ROTATION_Y_DISP(x, y, surface) \
-    ((TW_ROTATION ==   0) ? (y) : \
-     (TW_ROTATION ==  90) ? (x) : \
-     (TW_ROTATION == 180) ? ((surface)->height - (y) - 1) : \
-     (TW_ROTATION == 270) ? ((surface)->height - (x) - 1) : -1)
+int ROTATION_X_DISP(int x, int y, int w);
+
+int ROTATION_Y_DISP(int x, int y, int h);
 
 void surface_ROTATION_transform(gr_surface dst_ptr, const gr_surface src_ptr, size_t num_bytes_per_pixel);