diff --git a/db/compaction_job_stats_test.cc b/db/compaction_job_stats_test.cc
index 2685f6e45..df38bd3b7 100644
--- a/db/compaction_job_stats_test.cc
+++ b/db/compaction_job_stats_test.cc
@@ -553,7 +553,7 @@ uint64_t EstimatedFileSize(
   uint64_t data_size =
     static_cast<uint64_t>(
       num_records * (key_size + value_size * compression_ratio +
-      kPerKeyOverhead));
+                     kPerKeyOverhead));
 
   return data_size + kFooterSize
          + num_records * bloom_bits_per_key / 8      // filter block
diff --git a/db/db_test.cc b/db/db_test.cc
index 699861806..2c502c329 100644
--- a/db/db_test.cc
+++ b/db/db_test.cc
@@ -5243,11 +5243,11 @@ class RecoveryTestHelper {
     int fd = open(filename.c_str(), O_RDWR);
 
     ASSERT_GT(fd, 0);
-    ASSERT_EQ(offset, lseek(fd, offset, SEEK_SET));
+    ASSERT_EQ(offset, lseek(fd, static_cast<long>(offset), SEEK_SET));
 
     void* buf = alloca(len);
     memset(buf, 'a', len);
-    ASSERT_EQ(len, write(fd, buf, len));
+    ASSERT_EQ(len, write(fd, buf, static_cast<unsigned int>(len)));
 
     close(fd);
   }
diff --git a/db/internal_stats.cc b/db/internal_stats.cc
index 417c88ce3..d3e845875 100644
--- a/db/internal_stats.cc
+++ b/db/internal_stats.cc
@@ -43,9 +43,9 @@ void PrintLevelStatsHeader(char* buf, size_t len, const std::string& cf_name) {
 }
 
 void PrintLevelStats(char* buf, size_t len, const std::string& name,
-                     int num_files, int being_compacted, double total_file_size,
-                     double score, double w_amp,
-                     const InternalStats::CompactionStats& stats) {
+  int num_files, int being_compacted, double total_file_size,
+  double score, double w_amp,
+  const InternalStats::CompactionStats& stats) {
   uint64_t bytes_read =
       stats.bytes_read_non_output_levels + stats.bytes_read_output_level;
   int64_t bytes_new =
@@ -69,8 +69,8 @@ void PrintLevelStats(char* buf, size_t len, const std::string& name,
            "%9.0f "                    /* Comp(sec) */
            "%9d "                      /* Comp(cnt) */
            "%8.3f "                    /* Avg(sec) */
-           "%7s "                      /* KeyIn */
-           "%6s\n",                    /* KeyDrop */
+           "%7s "   /* KeyIn */
+           "%6s\n", /* KeyDrop */
            name.c_str(),
            num_files, being_compacted, total_file_size / kMB, score,
            bytes_read / kGB, stats.bytes_read_non_output_levels / kGB,
@@ -687,7 +687,8 @@ void InternalStats::DumpCFStats(std::string* value) {
             comp_stats_[level].bytes_read_non_output_levels;
       PrintLevelStats(buf, sizeof(buf), "L" + ToString(level), files,
                       files_being_compacted[level],
-                      vstorage->NumLevelBytes(level), compaction_score[level],
+                      static_cast<double>(vstorage->NumLevelBytes(level)),
+                      compaction_score[level],
                       w_amp, comp_stats_[level]);
       value->append(buf);
     }
diff --git a/db/version_set.cc b/db/version_set.cc
index 40adcda5f..bd18bf3a5 100644
--- a/db/version_set.cc
+++ b/db/version_set.cc
@@ -871,20 +871,17 @@ Version::Version(ColumnFamilyData* column_family_data, VersionSet* vset,
       refs_(0),
       version_number_(version_number) {}
 
-void Version::Get(const ReadOptions& read_options, const LookupKey& k,
-                  std::string* value, Status* status,
-                  MergeContext* merge_context, bool* value_found,
-                  bool* key_exists, SequenceNumber* seq) {
+void Version::Get(const ReadOptions& read_options,
+                  const LookupKey& k,
+                  std::string* value,
+                  Status* status,
+                  MergeContext* merge_context,
+                  bool* value_found) {
   Slice ikey = k.internal_key();
   Slice user_key = k.user_key();
 
   assert(status->ok() || status->IsMergeInProgress());
 
-  if (key_exists != nullptr) {
-    // will falsify below if not found
-    *key_exists = true;
-  }
-
   GetContext get_context(
       user_comparator(), merge_operator_, info_log_, db_statistics_,
       status->ok() ? GetContext::kNotFound : GetContext::kMerge, user_key,
diff --git a/include/rocksdb/delete_scheduler.h b/include/rocksdb/delete_scheduler.h
index 788d59239..7c3eaee77 100644
--- a/include/rocksdb/delete_scheduler.h
+++ b/include/rocksdb/delete_scheduler.h
@@ -7,6 +7,7 @@
 
 #include <map>
 #include <string>
+#include <memory>
 
 #include "rocksdb/status.h"