1 files changed, 1 insertions, 1 deletions
diff --git a/vm_dump.c b/vm_dump.c
index 31d08be50d..348582b934 100644
--- a/vm_dump.c
+++ b/vm_dump.c
@@ -151,7 +151,7 @@ rb_vmdebug_stack_dump_raw(const rb_execution_context_t *ec, const rb_control_fra
 
 	t = (VALUE *)*p;
 	if (ec->vm_stack <= t && t < sp) {
-	    fprintf(stderr, " (= %ld)", (long)((VALUE *)GC_GUARDED_PTR_REF(t) - ec->vm_stack));
+	    fprintf(stderr, " (= %ld)", (long)((VALUE *)GC_GUARDED_PTR_REF((VALUE)t) - ec->vm_stack));
 	}
 
 	if (p == ep)