diff --git a/sms_src/examples/generateRGBImg.sms b/sms_src/examples/generateRGBImg.sms
index f9b448f..2c954d7 100755
--- a/sms_src/examples/generateRGBImg.sms
+++ b/sms_src/examples/generateRGBImg.sms
@@ -1,4 +1,4 @@
-#!/usr/local/bin/sms -m64
+#!/usr/local/bin/sms -m256
 # Usage: This script demonstrates creating a rainbow gradient using colorTGA.write
 
 {
diff --git a/src/main/memory/sm_gc.c b/src/main/memory/sm_gc.c
index 4d43e48..7d9d7e1 100644
--- a/src/main/memory/sm_gc.c
+++ b/src/main/memory/sm_gc.c
@@ -166,13 +166,14 @@ void sm_inflate_heap(sm_heap *from, sm_heap *to) {
 // Copying GC
 void sm_garbage_collect() {
   if (sms_heap->used != 0) {
+    // Fill in the heap map
     sm_heap_scan(sms_heap);
     //  Build "to" heap if necessary, same size as current
     if (sms_other_heap == NULL)
       sms_other_heap = sm_new_heap(sms_heap->capacity, true);
-    // Clear for when we recycle a heap
+    // Clear other heap for when we recycle a heap
     sm_heap_clear(sms_other_heap);
-    // Try to shake off objects from callstack with some unregistered spacers
+    // Try to shake off objects from callstack with unregistered spacer
     if (evaluating)
       sm_new_space_at(sms_other_heap, (sm_gc_count(0) % 16) * 8);
     // Copy root (global context)
diff --git a/src/main/object/sm_space.c b/src/main/object/sm_space.c
index 181aab1..a9f3f4b 100644
--- a/src/main/object/sm_space.c
+++ b/src/main/object/sm_space.c
@@ -4,7 +4,7 @@
 
 // General purpose space of memory
 sm_space *sm_new_space(uint32_t size) {
-  sm_space *new_space = sm_malloc(sizeof(sm_space) + sm_round_size(size));
+  sm_space *new_space = sm_malloc(sizeof(sm_space) + sm_round_size64(size));
   new_space->my_type  = SM_SPACE_TYPE;
   new_space->size     = size;
   return new_space;