diff --git a/include/proto/hlua.h b/include/proto/hlua.h
index b9530aa..1428673 100644
--- a/include/proto/hlua.h
+++ b/include/proto/hlua.h
@@ -7,6 +7,11 @@
 
 #include <types/hlua.h>
 
+/* The following macros are used to set flags. */
+#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_INIT(__hlua) do { (__hlua)->T = 0; } while(0)
 
 /* Lua HAProxy integration functions. */
@@ -16,6 +21,8 @@
 
 #else /* USE_LUA */
 
+#define HLUA_IS_RUNNING(__hlua) 0
+
 #define HLUA_INIT(__hlua)
 
 /* Empty function for compilation without Lua. */
diff --git a/include/types/hlua.h b/include/types/hlua.h
index 2257d5c..5920e03 100644
--- a/include/types/hlua.h
+++ b/include/types/hlua.h
@@ -16,10 +16,7 @@
 
 struct session;
 
-enum hlua_state {
-	HLUA_STOP = 0,
-	HLUA_RUN,
-};
+#define HLUA_RUN       0x00000001
 
 enum hlua_exec {
 	HLUA_E_OK = 0,
@@ -37,7 +34,7 @@
 	int Mref; /* The reference of the memory context in coroutine case.
 	             -1 if the memory context is not used. */
 	int nargs; /* The number of arguments in the stack at the start of execution. */
-	enum hlua_state state; /* The current execution state. */
+	unsigned int flags; /* The current execution flags. */
 	struct task *task; /* The task associated with the lua stack execution.
 	                      We must wake this task to continue the task execution */
 	struct list com; /* The list head of the signals attached to this task. */