diff --git a/lodash.js b/lodash.js
index c30b35516..636a32a0a 100644
--- a/lodash.js
+++ b/lodash.js
@@ -2167,7 +2167,7 @@
       var cache = this.__data__;
       if (cache instanceof ListCache) {
         var pairs = cache.__data__;
-        if (!Map || pairs.length < LARGE_ARRAY_SIZE) {
+        if (!Map || (pairs.length < LARGE_ARRAY_SIZE - 1)) {
           pairs.push([key, value]);
           return this;
         }
diff --git a/test/test.js b/test/test.js
index a817370a9..74735d6c5 100644
--- a/test/test.js
+++ b/test/test.js
@@ -1026,7 +1026,7 @@
       var largeStack = new mapCaches.Stack(pairs),
           length = pairs ? pairs.length : 0;
 
-      lodashStable.times(LARGE_ARRAY_SIZE - length + 1, function() {
+      lodashStable.times(LARGE_ARRAY_SIZE - length, function() {
         largeStack.set({}, {});
       });