diff --git a/openbsc/src/bsc_hack.c b/openbsc/src/bsc_hack.c
index 7bd036a..15bc70c 100644
--- a/openbsc/src/bsc_hack.c
+++ b/openbsc/src/bsc_hack.c
@@ -685,7 +685,7 @@
 	/* header */0x55, 0x06, 0x19,
 	/* ccdesc */0x04 /*0x00*/, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 /*0x01*/,
-	/* rach */0xD5, 0x00, 0x00,
+	/* rach */0xD5, 0x04, 0x00,
 	/* s1 reset*/0x2B
 };
 
@@ -709,7 +709,7 @@
 	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 	/* ncc */0xFF,
-	/* rach*/0xD5, 0x00, 0x00
+	/* rach*/0xD5, 0x04, 0x00
 };
 
 /*
@@ -750,7 +750,7 @@
 	/* desc */0x01, 0x03, 0x00,
 	/* option*/0x28,
 	/* selection*/0x62, 0x00,
-	/* rach */0xD5, 0x00, 0x00,
+	/* rach */0xD5, 0x04, 0x00,
 	/* rest */ 0x2B, 0x2B, 0x2B, 0x2B
 };
 
@@ -783,7 +783,7 @@
 	/* header */0x41, 0x06, 0x1C,
 	/* lai */0x00, 0xF1, 0x10, 0x00, 0x01,
 	/* sel */0x62, 0x00,
-	/* rach*/0xD5, 0x00, 0x00,
+	/* rach*/0xD5, 0x04, 0x00,
 	/* cbch chan desc */ 0x64, 0x30, 0xE0, HARDCODED_ARFCN/*0x01*/,
 	/* rest octets */ 0x2B, 0x2B, 0x2B, 0x2B, 0x2B, 0x2B
 };