diff --git a/Build/Scripting/Lua.cfg b/Build/Scripting/Lua.cfg
index 699ebc3..d6573dd 100644
--- a/Build/Scripting/Lua.cfg
+++ b/Build/Scripting/Lua.cfg
@@ -61,7 +61,7 @@ keywords
 	max = "int a, int b";
 	sin = "angle a";
 	cos = "angle a";
-	tan = "angle a";
+	tan = "angle a, boolean newtan?";
 	FixedAngle = "fixed a";
 	AngleFixed = "angle a";
 	InvAngle = "angle a";
@@ -109,6 +109,7 @@ keywords
 	P_SPMAngle = "mobj_t source, int type, angle angle, [boolean allowaim?, [int flags2]]";
 	P_SpawnPlayerMissile = "mobj_t source, int type, [int flags2]";
 	P_MobjFlip = "mobj_t mobj";
+	P_GetMobjGravity = "mobj_t mobj";
 	P_WeaponOrPanel = "int type";
 	P_FlashPal = "player_t player, int type, int duration";
 	P_GetClosestAxis = "mobj_t mobj";
@@ -152,7 +153,7 @@ keywords
 	P_DoJumpShield = "player_t player";
 	P_IsObjectInGoop = "mobj_t mobj";
 // p_map
-	P_CheckPosition = "mobj_t mobj, fixed x, fixed y, fixed z";
+	P_CheckPosition = "mobj_t mobj, fixed x, fixed y";
 	P_TryMove = "mobj_t mobj, fixed x, fixed y, [boolean allowdrowoff?]";
 	P_Move = "mobj_t actor, int speed";
 	P_TeleportMove = "mobj_t mobj, fixed x, fixed y, fixed z";