1 files changed, 1 insertions, 1 deletions
diff --git a/gc.h b/gc.h
index d8df55dc38..fe2e07ded0 100644
--- a/gc.h
+++ b/gc.h
@@ -17,7 +17,7 @@ NOINLINE(void rb_gc_set_stack_end(VALUE **stack_end_p));
 #endif
 
 #if RUBY_MARK_FREE_DEBUG
-extern int ruby_gc_debug_indent = 0;
+extern int ruby_gc_debug_indent;
 
 static void
 rb_gc_debug_indent(void)