diff --git a/include/osmocom/crypt/auth.h b/include/osmocom/crypt/auth.h
index 4af8ca8..d872f64 100644
--- a/include/osmocom/crypt/auth.h
+++ b/include/osmocom/crypt/auth.h
@@ -30,11 +30,14 @@
 	OSMO_AUTH_ALG_COMP128v1,
 	OSMO_AUTH_ALG_COMP128v2,
 	OSMO_AUTH_ALG_COMP128v3,
-	OSMO_AUTH_ALG_XOR,
+	OSMO_AUTH_ALG_XOR_3G,
 	OSMO_AUTH_ALG_MILENAGE,
 	OSMO_AUTH_ALG_XOR_2G,
 	_OSMO_AUTH_ALG_NUM,
 };
+/* Backwards-compatibility. We used to call XOR-3G just "XOR" which became ambiguous when
+ * we started to add XOR-2G support. */
+#define OSMO_AUTH_ALG_XOR OSMO_AUTH_ALG_XOR_3G
 
 /*! permanent (secret) subscriber auth data */
 struct osmo_sub_auth_data {
diff --git a/src/gsm/auth_core.c b/src/gsm/auth_core.c
index af03ace..ce6ba7d 100644
--- a/src/gsm/auth_core.c
+++ b/src/gsm/auth_core.c
@@ -208,7 +208,7 @@
 	{ OSMO_AUTH_ALG_COMP128v1, "COMP128v1" },
 	{ OSMO_AUTH_ALG_COMP128v2, "COMP128v2" },
 	{ OSMO_AUTH_ALG_COMP128v3, "COMP128v3" },
-	{ OSMO_AUTH_ALG_XOR, "XOR" },
+	{ OSMO_AUTH_ALG_XOR_3G, "XOR-3G" },
 	{ OSMO_AUTH_ALG_MILENAGE, "MILENAGE" },
 	{ OSMO_AUTH_ALG_XOR_2G, "XOR-2G" },
 	{ 0, NULL }
diff --git a/src/gsm/auth_xor.c b/src/gsm/auth_xor.c
index 4507542..81076bd 100644
--- a/src/gsm/auth_xor.c
+++ b/src/gsm/auth_xor.c
@@ -168,8 +168,8 @@
 }
 
 static struct osmo_auth_impl xor_alg = {
-	.algo = OSMO_AUTH_ALG_XOR,
-	.name = "XOR (libosmogsm built-in)",
+	.algo = OSMO_AUTH_ALG_XOR_3G,
+	.name = "XOR-3G (libosmogsm built-in)",
 	.priority = 1000,
 	.gen_vec = &xor_gen_vec,
 	.gen_vec_auts = &xor_gen_vec_auts,