diff --git a/src/gsm/abis_nm.c b/src/gsm/abis_nm.c
index f6d4003..f3f3a42 100644
--- a/src/gsm/abis_nm.c
+++ b/src/gsm/abis_nm.c
@@ -380,7 +380,7 @@
 	return get_value_string(avail_names, avail);
 }
 
-static struct value_string test_names[] = {
+static const struct value_string test_names[] = {
 	/* FIXME: standard test names */
 	{ NM_IPACC_TESTNO_CHAN_USAGE, "Channel Usage" },
 	{ NM_IPACC_TESTNO_BCCH_CHAN_USAGE, "BCCH Channel Usage" },
diff --git a/src/gsm/lapd_core.c b/src/gsm/lapd_core.c
index 96099ed..d9a1a63 100644
--- a/src/gsm/lapd_core.c
+++ b/src/gsm/lapd_core.c
@@ -2070,7 +2070,7 @@
 }
 
 /* statefull handling for DL SAP messages from L3 */
-static struct l2downstate {
+static const struct l2downstate {
 	uint32_t	states;
 	int		prim, op;
 	const char 	*name;