diff --git a/src/osmo_e1.c b/src/osmo_e1.c
index 5134965..f47e8ed 100644
--- a/src/osmo_e1.c
+++ b/src/osmo_e1.c
@@ -389,10 +389,10 @@
 	if (smf2)
 		offset = 8;
 
-	crc |= (e1i->rx.ts0_history[0+offset] >> 7) << 3;
-	crc |= (e1i->rx.ts0_history[2+offset] >> 7) << 2;
-	crc |= (e1i->rx.ts0_history[4+offset] >> 7) << 1;
-	crc |= (e1i->rx.ts0_history[6+offset] >> 7) << 0;
+	crc |= (e1i->rx.ts0_history[0+offset] >> 7) << 0;
+	crc |= (e1i->rx.ts0_history[2+offset] >> 7) << 1;
+	crc |= (e1i->rx.ts0_history[4+offset] >> 7) << 2;
+	crc |= (e1i->rx.ts0_history[6+offset] >> 7) << 3;
 
 	return crc;
 }