diff --git a/src/add-ons/media/media-add-ons/mixer/MixerInput.cpp b/src/add-ons/media/media-add-ons/mixer/MixerInput.cpp
index ec4126516d0..5bb5085f618 100644
--- a/src/add-ons/media/media-add-ons/mixer/MixerInput.cpp
+++ b/src/add-ons/media/media-add-ons/mixer/MixerInput.cpp
@@ -153,7 +153,7 @@ MixerInput::BufferReceived(BBuffer* buffer)
 		start, offset);
 
 	int in_frames = size / bytes_per_frame(fInput.format.u.raw_audio);
-	double frames = double(in_frames * fMixBufferFrameRate)
+	double frames = ((double)in_frames * fMixBufferFrameRate)
 		/ fInput.format.u.raw_audio.frame_rate;
 	int out_frames = int(frames);
 	fFractionalFrames += frames - double(out_frames);