diff --git a/sdl2-hyper-sonic-drivers/src/HyperSonicDrivers/audio/IAudioStream.hpp b/sdl2-hyper-sonic-drivers/src/HyperSonicDrivers/audio/IAudioStream.hpp
index 2c922398..ac822e05 100644
--- a/sdl2-hyper-sonic-drivers/src/HyperSonicDrivers/audio/IAudioStream.hpp
+++ b/sdl2-hyper-sonic-drivers/src/HyperSonicDrivers/audio/IAudioStream.hpp
@@ -23,6 +23,5 @@ namespace HyperSonicDrivers::audio
         virtual uint32_t getRate() const = 0;
         virtual bool endOfData() const = 0;
         virtual bool isEnded() const { return endOfData(); }
-        //virtual void forward(const uint32_t ms) = 0;
     };
 }
diff --git a/sdl2-hyper-sonic-drivers/src/HyperSonicDrivers/audio/streams/PCMStream.hpp b/sdl2-hyper-sonic-drivers/src/HyperSonicDrivers/audio/streams/PCMStream.hpp
index fe22db6a..905dc6a6 100644
--- a/sdl2-hyper-sonic-drivers/src/HyperSonicDrivers/audio/streams/PCMStream.hpp
+++ b/sdl2-hyper-sonic-drivers/src/HyperSonicDrivers/audio/streams/PCMStream.hpp
@@ -19,6 +19,7 @@ namespace HyperSonicDrivers::audio::streams
         bool endOfData() const override;
 
         void forward(const uint32_t bytes) noexcept;
+
         std::shared_ptr<PCMSound>  getSound() const noexcept;
     private:
         std::shared_ptr<PCMSound> m_sound;
diff --git a/sdl2-hyper-sonic-drivers/src/HyperSonicDrivers/drivers/PCMDriver.cpp b/sdl2-hyper-sonic-drivers/src/HyperSonicDrivers/drivers/PCMDriver.cpp
index 6fb2f13d..811b6922 100644
--- a/sdl2-hyper-sonic-drivers/src/HyperSonicDrivers/drivers/PCMDriver.cpp
+++ b/sdl2-hyper-sonic-drivers/src/HyperSonicDrivers/drivers/PCMDriver.cpp
@@ -99,7 +99,7 @@ namespace HyperSonicDrivers::drivers
         releaseStreams_();
     }
 
-    void PCMDriver::forward(const uint32_t ms) noexcept
+    void PCMDriver::forward(const uint32_t ms) const noexcept
     {
         for (const auto& [stream, _] : m_PCMStreams_channels)
             stream->forward(utils::ms_toPos(ms, stream->getSound()));
diff --git a/sdl2-hyper-sonic-drivers/src/HyperSonicDrivers/drivers/PCMDriver.hpp b/sdl2-hyper-sonic-drivers/src/HyperSonicDrivers/drivers/PCMDriver.hpp
index 0d4fe1ec..4d6f223a 100644
--- a/sdl2-hyper-sonic-drivers/src/HyperSonicDrivers/drivers/PCMDriver.hpp
+++ b/sdl2-hyper-sonic-drivers/src/HyperSonicDrivers/drivers/PCMDriver.hpp
@@ -34,7 +34,7 @@ namespace HyperSonicDrivers::drivers
         void stop(const std::shared_ptr<audio::PCMSound>& sound, const bool releaseEndedStreams = true);
         void stop() noexcept;
 
-        void forward(const uint32_t ms) noexcept;
+        void forward(const uint32_t ms) const noexcept;
 
         const uint8_t max_streams;
     private: