diff --git a/src/frontend/qt_sdl/Config.cpp b/src/frontend/qt_sdl/Config.cpp
index 0a161b6f..3f570302 100644
--- a/src/frontend/qt_sdl/Config.cpp
+++ b/src/frontend/qt_sdl/Config.cpp
@@ -80,7 +80,7 @@ RangeList IntRanges =
     {"3D.Renderer", {0, renderer3D_Max-1}},
     {"Screen.VSyncInterval", {1, 20}},
     {"3D.GL.ScaleFactor", {1, 16}},
-    {"Audio.Interpolation", {0, 3}},
+    {"Audio.Interpolation", {0, 4}},
     {"Instance*.Audio.Volume", {0, 256}},
     {"Mic.InputType", {0, micInputType_MAX-1}},
     {"Instance*.Window*.ScreenRotation", {0, screenRot_MAX-1}},