diff --git a/src/js_init.cpp b/src/js_init.cpp
index 9dbb67ee..f6125958 100644
--- a/src/js_init.cpp
+++ b/src/js_init.cpp
@@ -2,12 +2,12 @@
  * Proprietary and Confidential
  */
 
-#import "js_init.h"
-#import "js_realm.hpp"
-#import "js_object.hpp"
-#import "js_util.hpp"
-#import "js_schema.hpp"
-#import "platform.hpp"
+#include "js_init.h"
+#include "js_realm.hpp"
+#include "js_object.hpp"
+#include "js_util.hpp"
+#include "js_schema.hpp"
+#include "platform.hpp"
 
 #include "shared_realm.hpp"
 #include <algorithm>
diff --git a/src/js_init.h b/src/js_init.h
index 26401799..876844e2 100644
--- a/src/js_init.h
+++ b/src/js_init.h
@@ -2,6 +2,8 @@
  * Proprietary and Confidential
  */
 
+#pragma once
+
 #include <JavaScriptCore/JSBase.h>
 
 #ifdef __cplusplus
diff --git a/src/js_list.hpp b/src/js_list.hpp
index 5444621d..3f459ca7 100644
--- a/src/js_list.hpp
+++ b/src/js_list.hpp
@@ -2,9 +2,11 @@
  * Proprietary and Confidential
  */
 
-#import "js_util.hpp"
-#import "shared_realm.hpp"
-#import "list.hpp"
+#pragma once
+
+#include "js_util.hpp"
+#include "shared_realm.hpp"
+#include "list.hpp"
 
 JSClassRef RJSListClass();
 JSObjectRef RJSListCreate(JSContextRef ctx, realm::List &list);
diff --git a/src/js_object.hpp b/src/js_object.hpp
index b40189c5..f1028e3e 100644
--- a/src/js_object.hpp
+++ b/src/js_object.hpp
@@ -2,7 +2,9 @@
  * Proprietary and Confidential
  */
 
-#import "js_util.hpp"
+#pragma once
+
+#include "js_util.hpp"
 
 namespace realm {
     class Object;
diff --git a/src/js_realm.hpp b/src/js_realm.hpp
index d16f9c78..fa2b4fdd 100644
--- a/src/js_realm.hpp
+++ b/src/js_realm.hpp
@@ -2,7 +2,9 @@
  * Proprietary and Confidential
  */
 
-#import "js_util.hpp"
+#pragma once
+
+#include "js_util.hpp"
 #include <map>
 
 namespace realm {
diff --git a/src/js_results.hpp b/src/js_results.hpp
index 3867a6b1..3f0e9aa1 100644
--- a/src/js_results.hpp
+++ b/src/js_results.hpp
@@ -2,7 +2,9 @@
  * Proprietary and Confidential
  */
 
-#import "js_util.hpp"
+#pragma once
+
+#include "js_util.hpp"
 
 namespace realm {
     class Realm;
diff --git a/src/js_schema.hpp b/src/js_schema.hpp
index 24160af6..4564fcf4 100644
--- a/src/js_schema.hpp
+++ b/src/js_schema.hpp
@@ -2,8 +2,10 @@
  * Proprietary and Confidential
  */
 
-#import "js_util.hpp"
-#import <map>
+#pragma once
+
+#include "js_util.hpp"
+#include <map>
 
 namespace realm {
     class Schema;
diff --git a/src/js_util.cpp b/src/js_util.cpp
index 2cd1f68f..409ce1b7 100644
--- a/src/js_util.cpp
+++ b/src/js_util.cpp
@@ -3,6 +3,7 @@
  */
 
 #include "js_util.hpp"
+#include <JavaScriptCore/JSStringRef.h>
 
 using namespace realm;
 
diff --git a/src/js_util.hpp b/src/js_util.hpp
index 4cac1c3a..2a359fba 100644
--- a/src/js_util.hpp
+++ b/src/js_util.hpp
@@ -2,7 +2,11 @@
  * Proprietary and Confidential
  */
 
+#pragma once
+
+#include <JavaScriptCore/JSContextRef.h>
 #include <JavaScriptCore/JSObjectRef.h>
+#include <JavaScriptCore/JSStringRef.h>
 
 #include <string>
 #include <stdexcept>