diff --git a/vm/data_gc.c b/vm/data_gc.c
index c43fe69bd1..b7bba4997e 100755
--- a/vm/data_gc.c
+++ b/vm/data_gc.c
@@ -91,13 +91,11 @@ F_DATA_HEAP *alloc_data_heap(CELL gens,
 
 F_DATA_HEAP *grow_data_heap(F_DATA_HEAP *data_heap, CELL requested_bytes)
 {
-	CELL new_young_size = (data_heap->young_size * 2) + requested_bytes;
-	CELL new_aging_size = (data_heap->aging_size * 2) + requested_bytes;
 	CELL new_tenured_size = (data_heap->tenured_size * 2) + requested_bytes;
 
 	return alloc_data_heap(data_heap->gen_count,
-		new_young_size,
-		new_aging_size,
+		data_heap->young_size,
+		data_heap->aging_size,
 		new_tenured_size);
 }
 
diff --git a/vm/factor.c b/vm/factor.c
index c8791b8972..49f85c3485 100755
--- a/vm/factor.c
+++ b/vm/factor.c
@@ -21,7 +21,7 @@ void default_parameters(F_PARAMETERS *p)
 
 	p->gen_count = 3;
 	p->code_size = 8 * CELLS;
-	p->young_size = 2;
+	p->young_size = 1;
 	p->aging_size = 2;
 	p->tenured_size = 4 * CELLS;
 #endif