diff --git a/script/benchmark.py b/script/benchmark.py
index f346c720..f7116d29 100755
--- a/script/benchmark.py
+++ b/script/benchmark.py
@@ -76,7 +76,7 @@ false""")
 
 BENCHMARK("map_numeric", r"""500000500000""")
 
-BENCHMARK("map_string", r"""3645600""")
+BENCHMARK("map_string", r"""12799920000""")
 
 BENCHMARK("string_equals", r"""3000000""")
 
diff --git a/test/benchmark/map_string.lua b/test/benchmark/map_string.lua
index 4c972987..3e9445f6 100644
--- a/test/benchmark/map_string.lua
+++ b/test/benchmark/map_string.lua
@@ -80,9 +80,10 @@ end
 local start = os.clock()
 
 local map = {}
-
+local i = 0
 for _, key in ipairs(keys) do
-  map[key] = string.len(key)
+  map[key] = i
+  i = i + 1
 end
 
 local sum = 0
diff --git a/test/benchmark/map_string.py b/test/benchmark/map_string.py
index 4e2c8d31..5cab8a36 100644
--- a/test/benchmark/map_string.py
+++ b/test/benchmark/map_string.py
@@ -81,9 +81,10 @@ for animal in animals:
 start = time.clock()
 
 map = {}
-
+i = 0
 for key in keys:
-  map[key] = len(key)
+  map[key] = i
+  i += 1
 
 sum = 0
 for key in keys:
diff --git a/test/benchmark/map_string.rb b/test/benchmark/map_string.rb
index 2238fc92..1b60b134 100644
--- a/test/benchmark/map_string.rb
+++ b/test/benchmark/map_string.rb
@@ -80,9 +80,10 @@ end
 start = Time.now
 
 map = Hash.new
-
+i = 0
 for key in keys
-  map[key] = key.length
+  map[key] = i
+  i += 1
 end
 
 sum = 0
diff --git a/test/benchmark/map_string.wren b/test/benchmark/map_string.wren
index 12e3c024..f0157bf9 100644
--- a/test/benchmark/map_string.wren
+++ b/test/benchmark/map_string.wren
@@ -81,8 +81,10 @@ var start = IO.clock
 
 var map = {}
 
+var i = 0
 for (key in keys) {
-  map[key] = key.count
+  map[key] = i
+  i = i + 1
 }
 
 var sum = 0