1 files changed, 1 insertions, 2 deletions
diff --git a/vm_dump.c b/vm_dump.c
index bc7af85994..185646d5aa 100644
--- a/vm_dump.c
+++ b/vm_dump.c
@@ -12,6 +12,7 @@
 #include "ruby/ruby.h"
 #include "addr2line.h"
 #include "vm_core.h"
+#include "internal.h"
 
 /* see vm_insnhelper.h for the values */
 #ifndef VMDEBUG
@@ -756,8 +757,6 @@ dump_thread(void *arg)
 }
 #endif
 
-void rb_backtrace_print_as_bugreport(void);
-
 void
 rb_vm_bugreport(void)
 {