diff --git a/js-assembler/assemble-helpers.rkt b/js-assembler/assemble-helpers.rkt
index 80b1244..7839efc 100644
--- a/js-assembler/assemble-helpers.rkt
+++ b/js-assembler/assemble-helpers.rkt
@@ -151,8 +151,7 @@
                (format "RT.makePath(~s)"
                        (path->string val))]
               [(vector? val)
-               (format "RT.makeVector(~a,[~a])"
-                       (vector-length val)
+               (format "RT.makeVector([~a])"
                        (string-join (for/list ([elt (vector->list val)])
                                        (loop elt))
                                     ","))]
diff --git a/js-assembler/runtime-src/baselib-primitives.js b/js-assembler/runtime-src/baselib-primitives.js
index 30b114a..d66267d 100644
--- a/js-assembler/runtime-src/baselib-primitives.js
+++ b/js-assembler/runtime-src/baselib-primitives.js
@@ -707,7 +707,7 @@
             for (i = 0; i < M.a; i++) {
                 result.push(M.e[M.e.length-1-i]);
             }
-            var newVector = makeVector(result.length, result);
+            var newVector = makeVector(result);
             return newVector;
         });
 
@@ -727,7 +727,7 @@
             for(i = 0; i < length; i++) {
                 arr[i] = value;
             }
-            return makeVector(arr.length, arr);
+            return makeVector(arr);
         });
 
     installPrimitiveProcedure(
@@ -753,7 +753,7 @@
                 result.push(firstArg.first);
                 firstArg = firstArg.rest;
             }
-            return makeVector(result.length, result);
+            return makeVector(result);
         });
 
 
diff --git a/js-assembler/runtime-src/baselib-readergraph.js b/js-assembler/runtime-src/baselib-readergraph.js
index 38df0aa..dbd841e 100644
--- a/js-assembler/runtime-src/baselib-readergraph.js
+++ b/js-assembler/runtime-src/baselib-readergraph.js
@@ -22,7 +22,7 @@
 
         if (baselib.vectors.isVector(x)) {
             var len = x.length();
-            var aVector = baselib.vectors.makeVector(len, x.elts);
+            var aVector = baselib.vectors.makeVector(x.elts.slice(0));
             objectHash.put(x, aVector); 
             for (i = 0; i < len; i++) {
                 aVector.elts[i] = readerGraph(aVector.elts[i], objectHash, n + 1);
diff --git a/js-assembler/runtime-src/baselib-vectors.js b/js-assembler/runtime-src/baselib-vectors.js
index 1bb72b6..4a126de 100644
--- a/js-assembler/runtime-src/baselib-vectors.js
+++ b/js-assembler/runtime-src/baselib-vectors.js
@@ -7,20 +7,14 @@
 
 
 
-    var Vector = function (n, initialElements) {
+    var Vector = function (initialElements) {
         var i;
-        this.elts = [];
-        this.elts.length = n;
-        if (initialElements) {
-            for (i = 0; i < n; i++) {
-                this.elts[i] = initialElements[i];
-            }
-        }
+        this.elts = initialElements;
         this.mutable = true;
     };
 
-    Vector.makeInstance = function (n, elts) {
-        return new Vector(n, elts);
+    Vector.makeInstance = function (elts) {
+        return new Vector(elts);
     };
 
     Vector.prototype.length = function () {
@@ -115,12 +109,12 @@
     var isVector = function (x) { return x instanceof Vector; };
 
     // makeVector: x ... -> vector
-    var makeVector = function (n, elts) {
-        return Vector.makeInstance(n, elts);
+    var makeVector = function (elts) {
+        return Vector.makeInstance(elts);
     };
 
-    var makeVectorImmutable = function (n, elts) {
-        var v = Vector.makeInstance(n, elts);
+    var makeVectorImmutable = function (elts) {
+        var v = Vector.makeInstance(elts);
         v.mutable = false;
         return v;
     };
diff --git a/version.rkt b/version.rkt
index 6011f47..8311c00 100644
--- a/version.rkt
+++ b/version.rkt
@@ -7,4 +7,4 @@
 (provide version)
 (: version String)
 
-(define version "1.114")
+(define version "1.116")