diff --git a/docs/rh-log.txt b/docs/rh-log.txt
index 992c65624..feffba4a5 100644
--- a/docs/rh-log.txt
+++ b/docs/rh-log.txt
@@ -1,4 +1,13 @@
-July 15, 2009
+July 16, 2009
+- Added HotWax's A_SetArg.
+- Gez's patch for more A_WeaponReady flags:
+  * WRF_NOBOB (1): Weapon won't bob
+  * WRF_NOFIRE (12): Weapon won't fire at all
+  * WRF_NOSWITCH (2): Weapon can't be switched off
+  * WRF_NOPRIMARY (4): Weapon will not fire its main attack
+  * WRF_NOSECONDARY (8): Weapon will not fire its alt attack
+
+July 15, 2009
 - Attempt to add support for Microsoft's SideWinder Strategic Commander.
 
 July 14, 2009
diff --git a/src/thingdef/thingdef_codeptr.cpp b/src/thingdef/thingdef_codeptr.cpp
index 52de61485..c991bf374 100644
--- a/src/thingdef/thingdef_codeptr.cpp
+++ b/src/thingdef/thingdef_codeptr.cpp
@@ -2749,3 +2749,22 @@ DEFINE_ACTION_FUNCTION_PARAMS(AActor, A_ChangeVelocity)
 		CheckStopped(self);
 	}
 }
+
+//===========================================================================
+//
+// A_SetArg
+//
+//===========================================================================
+
+DEFINE_ACTION_FUNCTION_PARAMS(AActor, A_SetArg)
+{
+	ACTION_PARAM_START(2);
+	ACTION_PARAM_INT(pos, 0);
+	ACTION_PARAM_INT(value, 1);	
+
+	// Set the value of the specified arg
+	if ((size_t)pos < countof(self->args))
+	{
+		self->args[pos] = value;
+	}
+}
diff --git a/wadsrc/static/actors/actor.txt b/wadsrc/static/actors/actor.txt
index 425863b75..3a5e5c5ee 100644
--- a/wadsrc/static/actors/actor.txt
+++ b/wadsrc/static/actors/actor.txt
@@ -249,6 +249,7 @@ ACTOR Actor native //: Thinker
 	action native A_SetPitch(float pitch);
 	action native A_ScaleVelocity(float scale);
 	action native A_ChangeVelocity(float x = 0, float y = 0, float z = 0, int flags = 0);
+	action native A_SetArg(int pos, int value);
 
 	States
 	{