diff --git a/Sources/NIOHTTP2/ConnectionStateMachine/HasLocalSettings.swift b/Sources/NIOHTTP2/ConnectionStateMachine/HasLocalSettings.swift
index e5fd855c..71754b47 100644
--- a/Sources/NIOHTTP2/ConnectionStateMachine/HasLocalSettings.swift
+++ b/Sources/NIOHTTP2/ConnectionStateMachine/HasLocalSettings.swift
@@ -12,6 +12,8 @@
 //
 //===----------------------------------------------------------------------===//
 
+import NIOHPACK
+
 /// A protocol implemented by HTTP/2 connection state machine states with local settings.
 ///
 /// This protocol provides implementations that can apply changes to the local settings.
diff --git a/Sources/NIOHTTP2/ConnectionStateMachine/HasRemoteSettings.swift b/Sources/NIOHTTP2/ConnectionStateMachine/HasRemoteSettings.swift
index 511e8bd8..f356538d 100644
--- a/Sources/NIOHTTP2/ConnectionStateMachine/HasRemoteSettings.swift
+++ b/Sources/NIOHTTP2/ConnectionStateMachine/HasRemoteSettings.swift
@@ -12,6 +12,8 @@
 //
 //===----------------------------------------------------------------------===//
 
+import NIOHPACK
+
 /// A protocol implemented by HTTP/2 connection state machine states with remote settings.
 ///
 /// This protocol provides implementations that can apply changes to the remote settings.
diff --git a/Tests/NIOHTTP2Tests/HTTP2ErrorTests.swift b/Tests/NIOHTTP2Tests/HTTP2ErrorTests.swift
index f65260aa..2acf2a3e 100644
--- a/Tests/NIOHTTP2Tests/HTTP2ErrorTests.swift
+++ b/Tests/NIOHTTP2Tests/HTTP2ErrorTests.swift
@@ -13,6 +13,7 @@
 //===----------------------------------------------------------------------===//
 
 import NIOHTTP2
+import NIOHPACK
 import XCTest
 
 class HTTP2ErrorTests: XCTestCase {