diff --git a/Auth/FirebaseAuthUI/AccountManagement/FUIAccountSettingsOperation.h b/Auth/FirebaseAuthUI/AccountManagement/FUIAccountSettingsOperation.h
index 13b1865daf6..912e483314e 100644
--- a/Auth/FirebaseAuthUI/AccountManagement/FUIAccountSettingsOperation.h
+++ b/Auth/FirebaseAuthUI/AccountManagement/FUIAccountSettingsOperation.h
@@ -14,7 +14,7 @@
 //  limitations under the License.
 //
 
-@import Foundation;
+#import <Foundation/Foundation.h>;
 
 @class FIRAuth;
 @class FIRUser;
diff --git a/Auth/FirebaseAuthUI/FUIAuthErrors.h b/Auth/FirebaseAuthUI/FUIAuthErrors.h
index 885d9fa33b3..ade0c3fbe66 100644
--- a/Auth/FirebaseAuthUI/FUIAuthErrors.h
+++ b/Auth/FirebaseAuthUI/FUIAuthErrors.h
@@ -14,7 +14,7 @@
 //  limitations under the License.
 //
 
-@import Foundation;
+#import <Foundation/Foundation.h>;
 
 NS_ASSUME_NONNULL_BEGIN
 
diff --git a/Auth/FirebaseAuthUI/FirebaseAuthUI.h b/Auth/FirebaseAuthUI/FirebaseAuthUI.h
index 913b88f19b8..2c4a26b80a3 100644
--- a/Auth/FirebaseAuthUI/FirebaseAuthUI.h
+++ b/Auth/FirebaseAuthUI/FirebaseAuthUI.h
@@ -14,7 +14,7 @@
 //  limitations under the License.
 //
 
-@import UIKit;
+#import <UIKit/UIKit.h>;
 
 //! Project version number for FirebaseAuthUI.
 FOUNDATION_EXPORT double FirebaseAuthUIVersionNumber;
diff --git a/Database/FirebaseDatabaseUI/FUICollection.h b/Database/FirebaseDatabaseUI/FUICollection.h
index 5dbdf473767..51ad39dea7d 100644
--- a/Database/FirebaseDatabaseUI/FUICollection.h
+++ b/Database/FirebaseDatabaseUI/FUICollection.h
@@ -18,7 +18,7 @@
 
 // clang-format on
 
-@import Foundation;
+#import <Foundation/Foundation.h>;
 
 @class FIRDatabaseReference, FIRDatabaseQuery, FIRDataSnapshot;
 @protocol FUICollectionDelegate;
diff --git a/Database/FirebaseDatabaseUI/FUICollectionViewDataSource.h b/Database/FirebaseDatabaseUI/FUICollectionViewDataSource.h
index c5be74687bc..0db948c2059 100644
--- a/Database/FirebaseDatabaseUI/FUICollectionViewDataSource.h
+++ b/Database/FirebaseDatabaseUI/FUICollectionViewDataSource.h
@@ -18,7 +18,7 @@
 
 // clang-format on
 
-@import UIKit;
+#import <UIKit/UIKit.h>;
 
 #import "FUICollection.h"
 
diff --git a/Database/FirebaseDatabaseUI/FUITableViewDataSource.h b/Database/FirebaseDatabaseUI/FUITableViewDataSource.h
index 5d2338d20c3..418ea95bff3 100644
--- a/Database/FirebaseDatabaseUI/FUITableViewDataSource.h
+++ b/Database/FirebaseDatabaseUI/FUITableViewDataSource.h
@@ -18,7 +18,7 @@
 
 // clang-format on
 
-@import UIKit;
+#import <UIKit/UIKit.h>;
 
 #import "FUICollection.h"
 
diff --git a/Database/FirebaseDatabaseUI/FirebaseDatabaseUI.h b/Database/FirebaseDatabaseUI/FirebaseDatabaseUI.h
index ee3997c9a20..fdcf86250d5 100644
--- a/Database/FirebaseDatabaseUI/FirebaseDatabaseUI.h
+++ b/Database/FirebaseDatabaseUI/FirebaseDatabaseUI.h
@@ -14,7 +14,7 @@
 //  limitations under the License.
 //
 
-@import UIKit;
+#import <UIKit/UIKit.h>;
 
 //! Project version number for FirebaseDatabaseUI.
 FOUNDATION_EXPORT double FirebaseDatabaseUIVersionNumber;
diff --git a/FacebookAuth/FirebaseFacebookAuthUI/FirebaseFacebookAuthUI.h b/FacebookAuth/FirebaseFacebookAuthUI/FirebaseFacebookAuthUI.h
index 2367d6ea323..71c0e47aa26 100644
--- a/FacebookAuth/FirebaseFacebookAuthUI/FirebaseFacebookAuthUI.h
+++ b/FacebookAuth/FirebaseFacebookAuthUI/FirebaseFacebookAuthUI.h
@@ -14,7 +14,7 @@
 //  limitations under the License.
 //
 
-@import UIKit;
+#import <UIKit/UIKit.h>;
 
 //! Project version number for FirebaseFacebookAuthUI.
 FOUNDATION_EXPORT double FirebaseFacebookAuthUIVersionNumber;
diff --git a/Firestore/FirebaseFirestoreUI/FUIFirestoreCollectionViewDataSource.h b/Firestore/FirebaseFirestoreUI/FUIFirestoreCollectionViewDataSource.h
index ee223d84fc4..18006f46b24 100644
--- a/Firestore/FirebaseFirestoreUI/FUIFirestoreCollectionViewDataSource.h
+++ b/Firestore/FirebaseFirestoreUI/FUIFirestoreCollectionViewDataSource.h
@@ -18,7 +18,7 @@
 
 // clang-format on
 
-@import UIKit;
+#import <UIKit/UIKit.h>;
 
 #import "FUIBatchedArray.h"
 
diff --git a/Firestore/FirebaseFirestoreUI/FUIFirestoreTableViewDataSource.h b/Firestore/FirebaseFirestoreUI/FUIFirestoreTableViewDataSource.h
index c86ba41ee83..6fcb52175e6 100644
--- a/Firestore/FirebaseFirestoreUI/FUIFirestoreTableViewDataSource.h
+++ b/Firestore/FirebaseFirestoreUI/FUIFirestoreTableViewDataSource.h
@@ -18,7 +18,7 @@
 
 // clang-format on
 
-@import UIKit;
+#import <UIKit/UIKit.h>;
 
 #import "FUIBatchedArray.h"
 
diff --git a/Firestore/FirebaseFirestoreUI/FUISnapshotArrayDiff.h b/Firestore/FirebaseFirestoreUI/FUISnapshotArrayDiff.h
index dfc118d641c..1c4f767d9ac 100644
--- a/Firestore/FirebaseFirestoreUI/FUISnapshotArrayDiff.h
+++ b/Firestore/FirebaseFirestoreUI/FUISnapshotArrayDiff.h
@@ -14,7 +14,7 @@
 //  limitations under the License.
 //
 
-@import Foundation;
+#import <Foundation/Foundation.h>;
 
 NS_ASSUME_NONNULL_BEGIN
 
diff --git a/GoogleAuth/FirebaseGoogleAuthUI/FirebaseGoogleAuthUI.h b/GoogleAuth/FirebaseGoogleAuthUI/FirebaseGoogleAuthUI.h
index 7c831f74f0a..021283dfedb 100644
--- a/GoogleAuth/FirebaseGoogleAuthUI/FirebaseGoogleAuthUI.h
+++ b/GoogleAuth/FirebaseGoogleAuthUI/FirebaseGoogleAuthUI.h
@@ -14,7 +14,7 @@
 //  limitations under the License.
 //
 
-@import UIKit;
+#import <UIKit/UIKit.h>;
 
 //! Project version number for FirebaseGoogleAuthUI.
 FOUNDATION_EXPORT double FirebaseGoogleAuthUIVersionNumber;
diff --git a/PhoneAuth/FirebasePhoneAuthUI/FirebasePhoneAuthUI.h b/PhoneAuth/FirebasePhoneAuthUI/FirebasePhoneAuthUI.h
index df22ed38e20..1d87444a453 100644
--- a/PhoneAuth/FirebasePhoneAuthUI/FirebasePhoneAuthUI.h
+++ b/PhoneAuth/FirebasePhoneAuthUI/FirebasePhoneAuthUI.h
@@ -14,7 +14,7 @@
 //  limitations under the License.
 //
 
-@import UIKit;
+#import <UIKit/UIKit.h>;
 
 //! Project version number for FirebasePhoneAuthUI.
 FOUNDATION_EXPORT double FirebasePhoneAuthUIVersionNumber;
diff --git a/Storage/FirebaseStorageUI/UIImageView+FirebaseStorage.h b/Storage/FirebaseStorageUI/UIImageView+FirebaseStorage.h
index 5817c31577e..c111d6c6c25 100644
--- a/Storage/FirebaseStorageUI/UIImageView+FirebaseStorage.h
+++ b/Storage/FirebaseStorageUI/UIImageView+FirebaseStorage.h
@@ -14,7 +14,7 @@
 //  limitations under the License.
 //
 
-@import UIKit;
+#import <UIKit/UIKit.h>;
 
 #import <FirebaseStorage/FirebaseStorage.h>
 #import <SDWebImage/SDWebImage.h>