diff --git a/iocore/cache/CacheRead.cc b/iocore/cache/CacheRead.cc
index 9d9f2452b26..6b15fc9eabf 100644
--- a/iocore/cache/CacheRead.cc
+++ b/iocore/cache/CacheRead.cc
@@ -1181,8 +1181,8 @@ CacheVC::openReadStartHead(int event, Event *e)
       if (field) {
         uint64_t cl = static_cast<uint64_t>(field->value_get_int64());
         if (cl != doc_len) {
-          Warning("OpenReadHead failed for cachekey %X : alternate content length doesn't match doc_len %ld != %ld", key.slice32(0),
-                  cl, doc_len);
+          Warning("OpenReadHead failed for cachekey %X : alternate content length doesn't match doc_len %" PRId64 " != %" PRId64,
+                  key.slice32(0), cl, doc_len);
           CACHE_INCREMENT_DYN_STAT(cache_read_invalid_stat);
           err = ECACHE_BAD_META_DATA;
           goto Ldone;