diff --git a/src/jbig.c b/src/jbig.c
index 09a3d92..fce8e02 100644
--- a/src/jbig.c
+++ b/src/jbig.c
@@ -207,7 +207,7 @@ static void
 _procline(int line, char *a, char *b, char *c)
 {
 	/* The encoder must be erroneous */
-	uint16_t cx = (*b & 0x01) << 2;
+	uint16_t cx = 0;
 
 	for (int i = 0; i < _width; i++) {
 		_decode(cx);