diff --git a/vm_exec.h b/vm_exec.h
index 26d60b7cb6..f06399033d 100644
--- a/vm_exec.h
+++ b/vm_exec.h
@@ -36,7 +36,7 @@ typedef rb_iseq_t *ISEQ;
 #endif
 
 #define DEBUG_END_INSN() \
-  rb_vmdebug_debug_print_post(th, GET_CFP() SC_REGS());
+  rb_vmdebug_debug_print_post(ec, GET_CFP() SC_REGS());
 
 #else