1 files changed, 1 insertions, 1 deletions
diff --git a/gc.c b/gc.c
index 8209cf7db2..7295cb0b44 100644
--- a/gc.c
+++ b/gc.c
@@ -50,7 +50,7 @@
 
 int rb_io_fptr_finalize(struct rb_io_t*);
 
-#if !defined(setjmp) && defined(HAVE__SETJMP)
+#if !defined(setjmp) && defined(HAVE__SETJMP) && !defined(HAVE_SIGSETJMP)
 #define setjmp(env) _setjmp(env)
 #endif