diff --git a/include/config.h b/include/config.h
index d951a29d..9b6d3257 100644
--- a/include/config.h
+++ b/include/config.h
@@ -25,9 +25,10 @@
 /* #define DEBUG 1 */
 
 #if DEBUG
-# define GC_DEBUG 0
 # define GC_STRESS 1
 # define VM_DEBUG 1
+# define GC_DEBUG 1
+# define GC_DEBUG_DETAIL 0
 #endif
 
 #endif
diff --git a/src/gc.c b/src/gc.c
index 7c907e87..d27e5906 100644
--- a/src/gc.c
+++ b/src/gc.c
@@ -405,12 +405,12 @@ gc_sweep_phase(pic_state *pic)
 #endif
 
   base = pic->heap->base;
-#if GC_DEBUG
+#if GC_DEBUG_DETAIL
   printf("base = %p\nbase->s.ptr = %p\n", base, base->s.ptr);
 #endif
   for (p = base->s.ptr; ; p = p->s.ptr) {
 
-#if GC_DEBUG
+#if GC_DEBUG_DETAIL
     puts("sweeping block");
 #endif
 
@@ -418,7 +418,7 @@ gc_sweep_phase(pic_state *pic)
 
     for (bp = p + p->s.size; bp != p->s.ptr; bp += bp->s.size) {
 
-#if GC_DEBUG
+#if GC_DEBUG_DETAIL
       printf("  bp = %p\n  p  = %p\n  p->s.ptr = %p\n  endp = %p\n",bp, p, p->s.ptr, pic->heap->endp);
 #endif
 
@@ -426,7 +426,7 @@ gc_sweep_phase(pic_state *pic)
 	break;
       if (gc_is_marked(bp)) {
 
-#if GC_DEBUG
+#if GC_DEBUG_DETAIL
 	printf("marked:\t\t\t");
 	pic_debug(pic, pic_obj_value((struct pic_object *)(bp + 1)));
 	printf("\n");
@@ -436,10 +436,6 @@ gc_sweep_phase(pic_state *pic)
 	continue;
       }
 
-#if GC_DEBUG
-      puts("unmarked");
-#endif
-
       /* free! */
       gc_finalize_object(pic, (struct pic_object *)(bp + 1));
       if (bp + bp->s.size == p->s.ptr) {