diff --git a/benchmarks/conway/lua.lua b/benchmarks/conway/lua.lua
index e23bdf17..01cec8a5 100644
--- a/benchmarks/conway/lua.lua
+++ b/benchmarks/conway/lua.lua
@@ -1,7 +1,7 @@
-local m, ALIVE, DEAD;m = {}
+math.ln = math.log; local m = {}
 
-ALIVE = "*"
-DEAD  = " "
+local ALIVE = "*"
+local DEAD  = " "
 
 -- Create a new grid for the simulation.
 function m.new_canvas(N, M)
diff --git a/benchmarks/fannkuchredux/lua.lua b/benchmarks/fannkuchredux/lua.lua
index 76d437d0..fd684164 100644
--- a/benchmarks/fannkuchredux/lua.lua
+++ b/benchmarks/fannkuchredux/lua.lua
@@ -1,4 +1,4 @@
-local m = {}
+math.ln = math.log; local m = {}
 
 function m.fannkuch(N)