diff --git a/tumble_input.h b/tumble_input.h
index 2f62265..bb6a4cf 100644
--- a/tumble_input.h
+++ b/tumble_input.h
@@ -71,4 +71,4 @@ void init_jpeg_handler (void);
 void init_pbm_handler  (void);
 void init_png_handler  (void);
 
-input_handler_t blank_handler;
+extern input_handler_t blank_handler;