1 files changed, 1 insertions, 0 deletions
diff --git a/display.h b/display.h
index c441a7dd2..a3bc8ab1d 100644
--- a/display.h
+++ b/display.h
@@ -24,5 +24,6 @@ struct graphics_context {
 
 extern void plot(struct graphics_context *gc, cairo_rectangle_int_t *drawing_area, struct dive *dive);
 extern void set_source_rgb(struct graphics_context *gc, double r, double g, double b);
+extern void attach_tooltip(int x, int y, int w, int h, const char *text);
 
 #endif