diff --git a/tools/libxc/xc_dom_core.c b/tools/libxc/xc_dom_core.c
-index b1e90d8..d0b1320 100644
+index b1e90d8..2504afd 100644
--- a/tools/libxc/xc_dom_core.c
+++ b/tools/libxc/xc_dom_core.c
@@ -30,6 +30,8 @@ void xc_dom_loginit(void)
if ( xc_dom_logfile )
return;
xc_dom_logfile = fopen("/var/log/xen/domain-builder-ng.log", "a");
-+ if ( xc_dom_logfile )
++ if ( !xc_dom_logfile )
+ return;
setvbuf(xc_dom_logfile, NULL, _IONBF, 0);
xc_dom_printf("### ----- xc domain builder logfile opened -----\n");