diff --git a/include/proto/hlua.h b/include/proto/hlua.h
index 1428673..c3235da 100644
--- a/include/proto/hlua.h
+++ b/include/proto/hlua.h
@@ -11,6 +11,9 @@
 #define HLUA_SET_RUN(__hlua)         do {(__hlua)->flags |= HLUA_RUN;} while(0)
 #define HLUA_CLR_RUN(__hlua)         do {(__hlua)->flags &= ~HLUA_RUN;} while(0)
 #define HLUA_IS_RUNNING(__hlua)      ((__hlua)->flags & HLUA_RUN)
+#define HLUA_SET_CTRLYIELD(__hlua)   do {(__hlua)->flags |= HLUA_CTRLYIELD;} while(0)
+#define HLUA_CLR_CTRLYIELD(__hlua)   do {(__hlua)->flags &= ~HLUA_CTRLYIELD;} while(0)
+#define HLUA_IS_CTRLYIELDING(__hlua) ((__hlua)->flags & HLUA_CTRLYIELD)
 
 #define HLUA_INIT(__hlua) do { (__hlua)->T = 0; } while(0)