diff --git a/racket/src/racket/src/number.c b/racket/src/racket/src/number.c
index 24991c8d62..e66c8034ca 100644
--- a/racket/src/racket/src/number.c
+++ b/racket/src/racket/src/number.c
@@ -5499,7 +5499,7 @@ static Scheme_Object *fold_fixnum_bitwise_shift(int argc, Scheme_Object *argv[])
 #define UNSAFE_FX(name, op, fold, type, no_args)             \
  static Scheme_Object *name(int argc, Scheme_Object *argv[]) \
  {                                                           \
-   intptr_t v;                                               \
+   type v;                                                   \
    int i;                                                    \
    if (!argc) return no_args;                                \
    if (scheme_current_thread->constant_folding) return fold(argc, argv);     \