diff --git a/src/gui/SampleWaveform.cpp b/src/gui/SampleWaveform.cpp
index 01d21a8c581..783543ac587 100644
--- a/src/gui/SampleWaveform.cpp
+++ b/src/gui/SampleWaveform.cpp
@@ -53,7 +53,7 @@ void SampleWaveform::visualize(Parameters parameters, QPainter& painter, const Q
 
 	int pixelIndex = 0;
 
-	for (int i = 0; i < maxFrames; i += resolution)
+	for (int i = 0; i < maxFrames; i += static_cast<int>(resolution))
 	{
 		pixelIndex = i / framesPerPixel;
 		const int frameIndex = !parameters.reversed ? i : maxFrames - i;