diff --git a/Source/Engine/Audio/AudioBackend.h b/Source/Engine/Audio/AudioBackend.h
index 981e9c34d..53b207854 100644
--- a/Source/Engine/Audio/AudioBackend.h
+++ b/Source/Engine/Audio/AudioBackend.h
@@ -5,7 +5,6 @@
 #include "Config.h"
 #include "Types.h"
 #include "Engine/Core/Types/BaseTypes.h"
-#include "AudioSource.h"
 
 /// <summary>
 /// The helper class for that handles active audio backend operations.
@@ -103,17 +102,8 @@ public:
     class Source
     {
     public:
-        FORCE_INLINE static void SetState(AudioSource* source, AudioSource::States state)
-        {
-            if (source)
-                source->_state = state;
-        }
-
-        FORCE_INLINE static void SetStreamingFirstChunk(AudioSource* source, int32 chunkIndex)
-        {
-            if (source)
-                source->_streamingFirstChunk = chunkIndex;
-        }
+        // Helper accessors for Audio Source playback restoring after audio device change
+        static void SetStreamingFirstChunk(AudioSource* source, int32 chunkIndex);
 
         FORCE_INLINE static uint32 Add(const AudioDataInfo& format, const Vector3& position, const Quaternion& orientation, float volume, float pitch, float pan, bool loop, bool spatial, float attenuation, float minDistance, float doppler)
         {
diff --git a/Source/Engine/Audio/AudioSource.cpp b/Source/Engine/Audio/AudioSource.cpp
index d50707ad8..8629da70e 100644
--- a/Source/Engine/Audio/AudioSource.cpp
+++ b/Source/Engine/Audio/AudioSource.cpp
@@ -12,6 +12,11 @@
 #include "AudioBackend.h"
 #include "Audio.h"
 
+void AudioBackend::Source::SetStreamingFirstChunk(AudioSource* source, int32 chunkIndex)
+{
+    source->_streamingFirstChunk = chunkIndex;
+}
+
 AudioSource::AudioSource(const SpawnParams& params)
     : Actor(params)
     , _velocity(Vector3::Zero)
diff --git a/Source/Engine/Audio/AudioSource.h b/Source/Engine/Audio/AudioSource.h
index f2ecb6729..00adc35e5 100644
--- a/Source/Engine/Audio/AudioSource.h
+++ b/Source/Engine/Audio/AudioSource.h
@@ -6,8 +6,6 @@
 #include "Engine/Content/AssetReference.h"
 #include "AudioClip.h"
 
-class AudioBackend;
-
 /// <summary>
 /// Represents a source for emitting audio. Audio can be played spatially (gun shot), or normally (music). Each audio source must have an AudioClip to play - back, and it can also have a position in the case of spatial (3D) audio.
 /// </summary>
diff --git a/Source/Engine/Audio/OpenAL/AudioBackendOAL.cpp b/Source/Engine/Audio/OpenAL/AudioBackendOAL.cpp
index 6f3e851d0..501ebbb66 100644
--- a/Source/Engine/Audio/OpenAL/AudioBackendOAL.cpp
+++ b/Source/Engine/Audio/OpenAL/AudioBackendOAL.cpp
@@ -9,9 +9,9 @@
 #include "Engine/Core/Collections/Dictionary.h"
 #include "Engine/Tools/AudioTool/AudioTool.h"
 #include "Engine/Engine/Units.h"
+#include "Engine/Engine/Time.h"
 #include "Engine/Profiler/ProfilerCPU.h"
 #include "Engine/Profiler/ProfilerMemory.h"
-#include "Engine/Engine/Time.h"
 #include "Engine/Audio/Audio.h"
 #include "Engine/Audio/AudioListener.h"
 #include "Engine/Audio/AudioSource.h"