diff --git a/include/rocksdb/slice.h b/include/rocksdb/slice.h
index 9ccbdc51e..4c294c05e 100644
--- a/include/rocksdb/slice.h
+++ b/include/rocksdb/slice.h
@@ -202,6 +202,7 @@ class PinnableSlice : public Slice, public Cleanable {
   void Reset() {
     Cleanable::Reset();
     pinned_ = false;
+    size_ = 0;
   }
 
   inline std::string* GetSelf() { return buf_; }
@@ -255,4 +256,4 @@ inline size_t Slice::difference_offset(const Slice& b) const {
   return off;
 }
 
-}  // namespace rocksdb
\ No newline at end of file
+}  // namespace rocksdb