diff --git a/openbsc/src/rest_octets.c b/openbsc/src/rest_octets.c
index 6226203..6c8c403 100644
--- a/openbsc/src/rest_octets.c
+++ b/openbsc/src/rest_octets.c
@@ -37,7 +37,7 @@
 
 	memset(&bv, 0, sizeof(bv));
 	bv.data = data;
-	bv.data_len = 2;
+	bv.data_len = 1;
 
 	if (nch_pos) {
 		bitvec_set_bit(&bv, H);
@@ -45,7 +45,7 @@
 	} else
 		bitvec_set_bit(&bv, L);
 
-	bitvec_spare_padding(&bv, 15);
+	bitvec_spare_padding(&bv, 7);
 	return 0;
 }
 
@@ -95,7 +95,7 @@
 
 	memset(&bv, 0, sizeof(bv));
 	bv.data = data;
-	bv.data_len = 5;
+	bv.data_len = 4;
 
 	/* Optional Selection Parameters */
 	append_selection_params(&bv, &si3->selection_params);
@@ -141,7 +141,7 @@
 
 	memset(&bv, 0, sizeof(bv));
 	bv.data = data;
-	bv.data_len = 11; /* FIXME: up to ? */
+	bv.data_len = 10; /* FIXME: up to ? */
 
 	/* SI4 Rest Octets O */
 	append_selection_params(&bv, &si4->selection_params);
@@ -340,7 +340,7 @@
 
 	memset(&bv, 0, sizeof(bv));
 	bv.data = data;
-	bv.data_len = 21;
+	bv.data_len = 20;
 
 	if (0) {
 		/* No rest octets */