diff --git a/src/Backends/Audio/SoftwareMixer.cpp b/src/Backends/Audio/SoftwareMixer.cpp
index 5ca738d7..9c471a93 100644
--- a/src/Backends/Audio/SoftwareMixer.cpp
+++ b/src/Backends/Audio/SoftwareMixer.cpp
@@ -151,7 +151,7 @@ ATTRIBUTE_HOT void Mixer_MixSounds(float *stream, unsigned int frames_total)
 			for (unsigned int frames_done = 0; frames_done < frames_total; ++frames_done)
 			{
 				const size_t position_integral = (size_t)sound->position;
-				const double position_fractional = sound->position - position_integral;
+				const float position_fractional = sound->position - position_integral;
 
 				// Get two samples, and normalise them to 0-1
 				const float sample1 = (sound->samples[position_integral] - 128.0f) / 128.0f;