diff --git a/minui/minui.h b/minui/minui.h
index b8ca40b..103318a 100644
--- a/minui/minui.h
+++ b/minui/minui.h
@@ -46,6 +46,7 @@
  void gr_texticon(int x, int y, gr_surface icon);
 int gr_measure(const char *s);
 void gr_font_size(int *x, int *y);
+void gr_get_memory_surface(gr_surface);
 
 void gr_blit(gr_surface source, int sx, int sy, int w, int h, int dx, int dy);
 unsigned int gr_get_width(gr_surface surface);