diff --git a/src/queue.h b/src/queue.h
index 2f5ab610..aa15837d 100644
--- a/src/queue.h
+++ b/src/queue.h
@@ -16,8 +16,6 @@
 #ifndef QUEUE_H_
 #define QUEUE_H_
 
-#include <stdint.h>
-
 typedef void *QUEUE[2];
 
 /* Private macros. */
@@ -28,7 +26,7 @@ typedef void *QUEUE[2];
 
 /* Public macros. */
 #define QUEUE_DATA(ptr, type, field)                                          \
-  ((type *) ((char *) (ptr) - ((uintptr_t) &((type *) 0)->field)))
+  ((type *) ((char *) (ptr) - ((char *) &((type *) 0)->field)))
 
 #define QUEUE_FOREACH(q, h)                                                   \
   for ((q) = (QUEUE *) (*(h))[0]; (q) != (h); (q) = (QUEUE *) (*(q))[0])