diff --git a/include/mruby/value.h b/include/mruby/value.h
index b86b0e976..e78035b5f 100644
--- a/include/mruby/value.h
+++ b/include/mruby/value.h
@@ -74,6 +74,8 @@ typedef short mrb_sym;
 # else
 #  include <inttypes.h>
 # endif
+#else
+# include <inttypes.h>
 #endif
 
 typedef uint8_t mrb_bool;