diff --git a/eeshow/gfx/cro.c b/eeshow/gfx/cro.c
index e4ac88b..1cbfdfa 100644
--- a/eeshow/gfx/cro.c
+++ b/eeshow/gfx/cro.c
@@ -74,7 +74,7 @@ static inline int cx(const struct cro_ctx *cc, int x)
 
 static inline int xc(const struct cro_ctx *cc, int x)
 {
-	return (x - cc->xe) / cc->scale - cc->xe;
+	return (x - cc->xo) / cc->scale - cc->xe;
 }