diff --git a/sys/include/net/af.h b/sys/include/net/af.h
index a1fd0b566d..75610eaff3 100644
--- a/sys/include/net/af.h
+++ b/sys/include/net/af.h
@@ -24,7 +24,10 @@
 extern "C" {
 #endif
 
-enum {
+/**
+ * @brief   UNIX address family definitions
+ */
+typedef enum {
     AF_UNSPEC = 0,              /**< unspecified address family */
 #define AF_UNSPEC   AF_UNSPEC   /**< unspecified address family (as macro) */
     AF_UNIX,                    /**< local to host (pipes, portals) address family. */
@@ -39,7 +42,7 @@ enum {
     AF_NUMOF,                   /**< maximum number of address families on this system */
 #define AF_NUMOF    AF_NUMOF    /**< maximum number of address families on this system (as macro) */
 #define AF_MAX      AF_NUMOF    /**< alias for @ref AF_NUMOF */
-};
+} unix_af_t;
 
 #ifdef __cplusplus
 }