diff --git a/symbol.c b/symbol.c
index 94a751d5e3..1b2a77c7c4 100644
--- a/symbol.c
+++ b/symbol.c
@@ -35,7 +35,7 @@
 
 #define SYMBOL_PINNED_P(sym) (RSYMBOL(sym)->id&~ID_SCOPE_MASK)
 
-#define STATIC_SYM2ID(sym) RSHIFT((unsigned long)(sym), RUBY_SPECIAL_SHIFT)
+#define STATIC_SYM2ID(sym) RSHIFT((VALUE)(sym), RUBY_SPECIAL_SHIFT)
 
 static ID register_static_symid(ID, const char *, long, rb_encoding *);
 static ID register_static_symid_str(ID, VALUE);