1 files changed, 2 insertions, 2 deletions
diff --git a/vm_core.h b/vm_core.h
index 5f4e5d47f1..21e7d866c5 100644
--- a/vm_core.h
+++ b/vm_core.h
@@ -383,8 +383,8 @@ struct rb_unblock_callback {
 
 struct rb_mutex_struct;
 
-#ifdef SIGSTKSZ
-#define ALT_STACK_SIZE (SIGSTKSZ*2)
+#ifdef MINSIGSTKSZ
+#define ALT_STACK_SIZE (MINSIGSTKSZ*2)
 #else
 #define ALT_STACK_SIZE (4*1024)
 #endif