diff --git a/src/journal/journald-server.c b/src/journal/journald-server.c
index 02895b2068..c78678f1f6 100644
--- a/src/journal/journald-server.c
+++ b/src/journal/journald-server.c
@@ -1144,7 +1144,7 @@ static void server_dispatch_message_real(
                 IOVEC_ADD_STRING_FIELD(iovec, n, o->slice, "OBJECT_SYSTEMD_SLICE");
                 IOVEC_ADD_STRING_FIELD(iovec, n, o->user_slice, "OBJECT_SYSTEMD_USER_SLICE");
 
-                IOVEC_ADD_ID128_FIELD(iovec, n, o->invocation_id, "OBJECT_SYSTEMD_INVOCATION_ID=");
+                IOVEC_ADD_ID128_FIELD(iovec, n, o->invocation_id, "OBJECT_SYSTEMD_INVOCATION_ID");
         }
 
         assert(n <= m);