1 files changed, 1 insertions, 0 deletions
diff --git a/iseq.c b/iseq.c
index 28a9eca53a..0b9465ba68 100644
--- a/iseq.c
+++ b/iseq.c
@@ -17,6 +17,7 @@
 # include <dlfcn.h>
 #endif
 
+#define RUBY_VM_INSNS_INFO 1
 /* #define RUBY_MARK_FREE_DEBUG 1 */
 #include "gc.h"
 #include "vm_core.h"