diff --git a/include/leveldb/slice.h b/include/leveldb/slice.h
index 37cb82178d..e97223a743 100644
--- a/include/leveldb/slice.h
+++ b/include/leveldb/slice.h
@@ -51,6 +51,9 @@ class LEVELDB_EXPORT Slice {
   // Return true iff the length of the referenced data is zero
   bool empty() const { return size_ == 0; }
 
+  const char* begin() const { return data(); }
+  const char* end() const { return data() + size(); }
+
   // Return the ith byte in the referenced data.
   // REQUIRES: n < size()
   char operator[](size_t n) const {
diff --git a/util/hash.cc b/util/hash.cc
index 8122fa834d..fa252c72e1 100644
--- a/util/hash.cc
+++ b/util/hash.cc
@@ -27,7 +27,7 @@ uint32_t Hash(const char* data, size_t n, uint32_t seed) {
   uint32_t h = seed ^ (n * m);
 
   // Pick up four bytes at a time
-  while (data + 4 <= limit) {
+  while (limit - data >= 4) {
     uint32_t w = DecodeFixed32(data);
     data += 4;
     h += w;