diff --git a/include/rocksdb/cache.h b/include/rocksdb/cache.h
index 27b4a6f64..dfdc374d0 100644
--- a/include/rocksdb/cache.h
+++ b/include/rocksdb/cache.h
@@ -255,7 +255,7 @@ class Cache {
   // Always delete the DB object before calling this method!
   virtual void DisownData(){
       // default implementation is noop
-  };
+  }
 
   // Apply callback to all entries in the cache
   // If thread_safe is true, it will also lock the accesses. Otherwise, it will
diff --git a/include/rocksdb/env.h b/include/rocksdb/env.h
index e70a49ffc..8c3d74ecc 100644
--- a/include/rocksdb/env.h
+++ b/include/rocksdb/env.h
@@ -672,7 +672,7 @@ class RandomAccessFile {
   virtual size_t GetUniqueId(char* /*id*/, size_t /*max_size*/) const {
     return 0;  // Default implementation to prevent issues with backwards
                // compatibility.
-  };
+  }
 
   enum AccessPattern { NORMAL, RANDOM, SEQUENTIAL, WILLNEED, DONTNEED };
 
@@ -1414,7 +1414,7 @@ class RandomAccessFileWrapper : public RandomAccessFile {
   }
   size_t GetUniqueId(char* id, size_t max_size) const override {
     return target_->GetUniqueId(id, max_size);
-  };
+  }
   void Hint(AccessPattern pattern) override { target_->Hint(pattern); }
   bool use_direct_io() const override { return target_->use_direct_io(); }
   size_t GetRequiredBufferAlignment() const override {
diff --git a/include/rocksdb/slice.h b/include/rocksdb/slice.h
index 2b01e6d9a..00412bf3c 100644
--- a/include/rocksdb/slice.h
+++ b/include/rocksdb/slice.h
@@ -195,8 +195,15 @@ class PinnableSlice : public Slice, public Cleanable {
     }
   }
 
-  void remove_prefix(size_t /*n*/) {
-    assert(0);  // Not implemented
+  void remove_prefix(size_t n) {
+    assert(n <= size());
+    if (pinned_) {
+      data_ += n;
+      size_ -= n;
+    } else {
+      buf_->erase(0, n);
+      PinSelf();
+    }
   }
 
   void Reset() {
diff --git a/include/rocksdb/statistics.h b/include/rocksdb/statistics.h
index 10acbbbf8..e302abc8c 100644
--- a/include/rocksdb/statistics.h
+++ b/include/rocksdb/statistics.h
@@ -523,7 +523,7 @@ class Statistics {
   virtual bool getTickerMap(std::map<std::string, uint64_t>*) const {
     // Do nothing by default
     return false;
-  };
+  }
 
   // Override this function to disable particular histogram collection
   virtual bool HistEnabledForType(uint32_t type) const {