diff --git a/db/table_cache.cc b/db/table_cache.cc
index e18c20c99..20eb68e4b 100644
--- a/db/table_cache.cc
+++ b/db/table_cache.cc
@@ -29,6 +29,11 @@ static void UnrefEntry(void* arg1, void* arg2) {
   cache->Release(h);
 }
 
+static Slice GetSliceForFileNumber(uint64_t file_number) {
+  return Slice(reinterpret_cast<const char*>(&file_number),
+               sizeof(file_number));
+}
+
 TableCache::TableCache(const std::string& dbname,
                        const Options* options,
                        const EnvOptions& storage_options,
@@ -50,9 +55,7 @@ Status TableCache::FindTable(const EnvOptions& toptions,
                              Cache::Handle** handle, bool* table_io,
                              const bool no_io) {
   Status s;
-  char buf[sizeof(file_number)];
-  EncodeFixed64(buf, file_number);
-  Slice key(buf, sizeof(buf));
+  Slice key = GetSliceForFileNumber(file_number);
   *handle = cache_->Lookup(key);
   if (*handle == nullptr) {
     if (no_io) { // Dont do IO and return a not-found status
@@ -165,9 +168,7 @@ bool TableCache::PrefixMayMatch(const ReadOptions& options,
 }
 
 void TableCache::Evict(uint64_t file_number) {
-  char buf[sizeof(file_number)];
-  EncodeFixed64(buf, file_number);
-  cache_->Erase(Slice(buf, sizeof(buf)));
+  cache_->Erase(GetSliceForFileNumber(file_number));
 }
 
 }  // namespace rocksdb