1 files changed, 1 insertions, 0 deletions
diff --git a/gc.c b/gc.c
index bfd6689f8a..ad83006ea0 100644
--- a/gc.c
+++ b/gc.c
@@ -4004,6 +4004,7 @@ ruby_stack_length(VALUE **p)
     return STACK_LENGTH;
 }
 
+#define PREVENT_STACK_OVERFLOW 1
 #ifndef PREVENT_STACK_OVERFLOW
 #if !(defined(POSIX_SIGNAL) && defined(SIGSEGV) && defined(HAVE_SIGALTSTACK))
 # define PREVENT_STACK_OVERFLOW 1