diff --git a/image.c b/image.c
index 33c5462..f4fb487 100644
--- a/image.c
+++ b/image.c
@@ -44,6 +44,8 @@ initImage()
 	activeImage = TRUE;
 }
 
+int get_pixel_per_cell(int *ppc, int *ppl);
+
 int
 getCharSize()
 {