diff --git a/src/sigar.c b/src/sigar.c
index c68c5a40..9919a98b 100644
--- a/src/sigar.c
+++ b/src/sigar.c
@@ -1899,7 +1899,7 @@ sigar_net_interface_config_primary_get(sigar_t *sigar,
         return SIGAR_OK;
     }
     else {
-        return !SIGAR_OK;
+        return SIGAR_ENOENT;
     }
 }