diff --git a/sanei/sanei_thread.c b/sanei/sanei_thread.c
index 24487e37a..d3005eacd 100644
--- a/sanei/sanei_thread.c
+++ b/sanei/sanei_thread.c
@@ -117,7 +117,7 @@ sanei_thread_is_forked( void )
 static void
 sanei_thread_set_invalid( SANE_Pid *pid )
 {
-  pid->pid = SANE_FALSE;
+  pid->is_valid = SANE_FALSE;
 }
 #endif