diff --git a/src/scheduler.h b/src/scheduler.h
index cdb3a28f1a3482e934480b0c0ccd18f18b66d437..ac654580b2af2ffb506dc3fd9f0b988b89effbd0 100644
--- a/src/scheduler.h
+++ b/src/scheduler.h
@@ -52,7 +52,7 @@
 
 /* Flags . */
 #define scheduler_flag_none 0
-#define scheduler_flag_steal 1
+#define scheduler_flag_steal (1 << 1)
 
 /* Data of a scheduler. */
 struct scheduler {