diff --git a/src/udev/net/link-config.c b/src/udev/net/link-config.c
index 42745b6c59..28c0e633a3 100644
--- a/src/udev/net/link-config.c
+++ b/src/udev/net/link-config.c
@@ -993,7 +993,7 @@ int config_parse_ifalias(
         assert(rvalue);
         assert(data);
 
-        if (!isempty(rvalue)) {
+        if (isempty(rvalue)) {
                 *s = mfree(*s);
                 return 0;
         }