diff --git a/src/sigar.c b/src/sigar.c
index 05b6fa1f..57e9db40 100644
--- a/src/sigar.c
+++ b/src/sigar.c
@@ -880,8 +880,12 @@ int sigar_net_info_get(sigar_t *sigar,
 
     fclose(fp);
 
-    getdomainname(netinfo->domain, sizeof(netinfo->domain));
-    netinfo->domain[sizeof(netinfo->domain)-1] = '\0';
+    if (getdomainname(netinfo->domain, sizeof(netinfo->domain)) == 0) {
+        netinfo->domain[sizeof(netinfo->domain)-1] = '\0';
+    }
+    else {
+        netinfo->domain[0] = '\0';
+    }
 
     return SIGAR_OK;
 }