diff --git a/utilities/merge_operators/string_append/stringappend.h b/utilities/merge_operators/string_append/stringappend.h
index 3787773a8..fe60de904 100644
--- a/utilities/merge_operators/string_append/stringappend.h
+++ b/utilities/merge_operators/string_append/stringappend.h
@@ -4,6 +4,8 @@
  * Copyright 2013 Facebook
  */
 
+#pragma once
+
 #include "leveldb/merge_operator.h"
 #include "leveldb/slice.h"
 
diff --git a/utilities/merge_operators/string_append/stringappend2.h b/utilities/merge_operators/string_append/stringappend2.h
index a8f090ffd..c16a69299 100644
--- a/utilities/merge_operators/string_append/stringappend2.h
+++ b/utilities/merge_operators/string_append/stringappend2.h
@@ -10,6 +10,8 @@
  * Copyright 2013 Facebook
  */
 
+#pragma once
+
 #include "leveldb/merge_operator.h"
 #include "leveldb/slice.h"
 
diff --git a/utilities/redis/redis_list_iterator.h b/utilities/redis/redis_list_iterator.h
index dac56e9d6..bcb9ee9dd 100644
--- a/utilities/redis/redis_list_iterator.h
+++ b/utilities/redis/redis_list_iterator.h
@@ -37,6 +37,8 @@
  * Copyright 2013 Facebook
  */
 
+#pragma once
+
 #include <string>
 
 #include "redis_list_exception.h"
diff --git a/utilities/redis/redis_lists.h b/utilities/redis/redis_lists.h
index eee045bd9..b3aa515d4 100644
--- a/utilities/redis/redis_lists.h
+++ b/utilities/redis/redis_lists.h
@@ -8,6 +8,8 @@
  * Copyright 2013 Facebook
  */
 
+#pragma once
+
 #include <string>
 #include "leveldb/db.h"
 #include "redis_list_iterator.h"