diff --git a/src/if.c b/src/if.c
index fc315c1..aa594f6 100644
--- a/src/if.c
+++ b/src/if.c
@@ -211,7 +211,7 @@ int patty_ax25_if_addr_add(patty_ax25_if *iface,
     patty_ax25_addr *addr;
 
     if (find_addr(iface, callsign) != NULL) {
-        errno = EEXIST;
+        errno = EADDRINUSE;
 
         goto error_exists;
     }