diff --git a/gc.c b/gc.c
index d0a081fecf..d5210e3e93 100644
--- a/gc.c
+++ b/gc.c
@@ -3526,11 +3526,11 @@ gc_page_sweep(rb_objspace_t *objspace, rb_heap_t *heap, struct heap_page *sweep_
 		if (bitset & 1) {
 		    switch (BUILTIN_TYPE(p)) {
 		      default: { /* majority case */
-			  gc_report(2, objspace, "page_sweep: free %s\n", obj_info((VALUE)p));
+			  gc_report(2, objspace, "page_sweep: free %p\n", (void *)p);
 #if USE_RGENGC && RGENGC_CHECK_MODE
 			  if (!is_full_marking(objspace)) {
-			      if (RVALUE_OLD_P((VALUE)p)) rb_bug("page_sweep: %s - old while minor GC.", obj_info((VALUE)p));
-			      if (rgengc_remembered(objspace, (VALUE)p)) rb_bug("page_sweep: %s - remembered.", obj_info((VALUE)p));
+			      if (RVALUE_OLD_P((VALUE)p)) rb_bug("page_sweep: %p - old while minor GC.", (void *)p);
+			      if (rgengc_remembered(objspace, (VALUE)p)) rb_bug("page_sweep: %p - remembered.", (void *)p);
 			  }
 #endif
 			  if (obj_free(objspace, (VALUE)p)) {