diff --git a/libraries/AP_Scripting/lua/src/lfunc.h b/libraries/AP_Scripting/lua/src/lfunc.h
index c916e9878a..ec7fd3df38 100644
--- a/libraries/AP_Scripting/lua/src/lfunc.h
+++ b/libraries/AP_Scripting/lua/src/lfunc.h
@@ -26,7 +26,7 @@
 ** maximum number of upvalues in a closure (both C and Lua). (Value
 ** must fit in a VM register.)
 */
-#define MAXUPVAL	255
+#define MAXUPVAL	127
 
 
 /*
diff --git a/libraries/AP_Scripting/lua/src/lparser.c b/libraries/AP_Scripting/lua/src/lparser.c
index cc54de43c6..c41ac657bd 100644
--- a/libraries/AP_Scripting/lua/src/lparser.c
+++ b/libraries/AP_Scripting/lua/src/lparser.c
@@ -31,7 +31,7 @@
 
 /* maximum number of local variables per function (must be smaller
    than 250, due to the bytecode format) */
-#define MAXVARS		200
+#define MAXVARS		100
 
 
 #define hasmultret(k)		((k) == VCALL || (k) == VVARARG)