diff --git a/src/util.c b/src/util.c
index 0c41ceb5..13b01c81 100644
--- a/src/util.c
+++ b/src/util.c
@@ -166,6 +166,11 @@ bool util_is_broadcast_address(const uint8_t *addr)
 	return !memcmp(addr, bcast_addr, 6);
 }
 
+bool util_is_valid_sta_address(const uint8_t *addr)
+{
+	return !util_is_broadcast_address(addr) && !util_is_group_address(addr);
+}
+
 /* This function assumes that identity is not bigger than 253 bytes */
 const char *util_get_domain(const char *identity)
 {
diff --git a/src/util.h b/src/util.h
index dfd1c847..edc6e777 100644
--- a/src/util.h
+++ b/src/util.h
@@ -38,6 +38,7 @@ const char *util_address_to_string(const uint8_t *addr);
 bool util_string_to_address(const char *str, uint8_t *addr);
 bool util_is_group_address(const uint8_t *addr);
 bool util_is_broadcast_address(const uint8_t *addr);
+bool util_is_valid_sta_address(const uint8_t *addr);
 
 const char *util_get_domain(const char *identity);
 const char *util_get_username(const char *identity);