diff --git a/std/portable/memory.js b/std/portable/memory.js
index b693c038..3362a60f 100644
--- a/std/portable/memory.js
+++ b/std/portable/memory.js
@@ -3,16 +3,18 @@ module.exports = globalScope => {
   var HEAP_OFFSET = 0;
 
   globalScope["allocate_memory"] = function allocate_memory(size) {
-    if (!(size >>>= 0))
-      return 0;
+    if (!(size >>>= 0)) return 0;
+
     if (HEAP_OFFSET + size > HEAP.length) {
       var oldHeap = HEAP;
       HEAP = new Uint8Array(Math.max(65536, HEAP.length + size, HEAP.length * 2));
       HEAP.set(oldHeap);
     }
+
     var ptr = HEAP_OFFSET;
     if ((HEAP_OFFSET += size) & 7)
       HEAP_OFFSET = (HEAP_OFFSET | 7) + 1;
+
     return ptr;
   };
 
@@ -20,19 +22,15 @@ module.exports = globalScope => {
     // TODO
   };
 
-  globalScope["move_memory"] = function move_memory(dest, src, n) {
-    HEAP.copyWithin(dest, src, src + n);
+  globalScope["move_memory"] = function move_memory(dest, src, size) {
+    HEAP.copyWithin(dest, src, src + size);
   };
 
-  globalScope["store"] = function store(ptr, val, off) {
-    if (typeof off === "number")
-      ptr += off;
-    HEAP[ptr] = val;
+  globalScope["store"] = function store(ptr, value, offset) {
+    HEAP[ptr + (offset | 0)] = value;
   };
 
-  globalScope["load"] = function load(ptr) {
-    if (typeof off === "number")
-      ptr += off;
-    return HEAP[ptr];
+  globalScope["load"] = function load(ptr, offset) {
+    return HEAP[ptr + (offset | 0)];
   };
 };