1 files changed, 1 insertions, 1 deletions
diff --git a/gc.c b/gc.c
index ae7a8ca5dd..64907e9686 100644
--- a/gc.c
+++ b/gc.c
@@ -924,7 +924,7 @@ gc_sweep()
 	    else {
 		RBASIC(p)->flags &= ~FL_MARK;
 		live += sizeof(VALUE);
-		switch (TYPE(p)) {
+		switch (BUILTIN_TYPE(p)) {
 		  case T_OBJECT:
 		    live += size_of_table(ROBJECT(p)->iv_tbl);
 		    break;