diff --git a/openbsc/src/libbsc/system_information.c b/openbsc/src/libbsc/system_information.c
index c901a4a..aa1cb8d 100644
--- a/openbsc/src/libbsc/system_information.c
+++ b/openbsc/src/libbsc/system_information.c
@@ -70,8 +70,11 @@
 static int use_arfcn(const struct gsm_bts *bts, const int bis, const int ter,
 			const int pgsm, const int arfcn)
 {
+	if (bts->force_combined_si)
+		return !bis && !ter;
 	if (!bis && !ter && band_compatible(bts, arfcn))
 		return 1;
+	/* Correct but somehow broken with either the nanoBTS or the iPhone5 */
 	if (bis && pgsm && band_compatible(bts, arfcn) && (arfcn < 1 || arfcn > 124))
 		return 1;
 	if (ter && !band_compatible(bts, arfcn))