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-rw-r--r--vm.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/vm.c b/vm.c
index 279c1ea..7c4d6fe 100644
--- a/vm.c
+++ b/vm.c
@@ -8,7 +8,9 @@
**********************************************************************/
+#ifndef VM_CHECK_MODE
#define VM_CHECK_MODE 0
+#endif
#include "internal.h"
#include "ruby/vm.h"