diff --git a/vm/factor.c b/vm/factor.c
index 49f85c3485..c3d85eff5e 100755
--- a/vm/factor.c
+++ b/vm/factor.c
@@ -21,8 +21,8 @@ void default_parameters(F_PARAMETERS *p)
 
 	p->gen_count = 3;
 	p->code_size = 8 * CELLS;
-	p->young_size = 1;
-	p->aging_size = 2;
+	p->young_size = CELLS / 4;
+	p->aging_size = CELLS / 2;
 	p->tenured_size = 4 * CELLS;
 #endif