diff --git a/util/arena.cc b/util/arena.cc
index 601230a0e..51b56da7d 100644
--- a/util/arena.cc
+++ b/util/arena.cc
@@ -14,7 +14,6 @@
 
 namespace rocksdb {
 
-const size_t Arena::kInlineSize = 2048;
 const size_t Arena::kMinBlockSize = 4096;
 const size_t Arena::kMaxBlockSize = 2 << 30;
 static const int kAlignUnit = sizeof(void*);
diff --git a/util/arena.h b/util/arena.h
index bb45ea5af..0c9aa9738 100644
--- a/util/arena.h
+++ b/util/arena.h
@@ -28,7 +28,7 @@ class Arena {
   Arena(const Arena&) = delete;
   void operator=(const Arena&) = delete;
 
-  static const size_t kInlineSize;
+  static const size_t kInlineSize = 2048;
   static const size_t kMinBlockSize;
   static const size_t kMaxBlockSize;