diff --git a/host/platform/Windows/capture/DXGI/src/pp/rgb24.c b/host/platform/Windows/capture/DXGI/src/pp/rgb24.c
index ae8318cb..8f0f29f9 100644
--- a/host/platform/Windows/capture/DXGI/src/pp/rgb24.c
+++ b/host/platform/Windows/capture/DXGI/src/pp/rgb24.c
@@ -78,7 +78,7 @@ static bool rgb24_configure(void * opaque,
 
   if (!this.pshader)
   {
-    this.width  = *cols;
+    this.width  = *cols * 3 / 4;
     this.height = *rows;
 
     char sOutputWidth[6], sOutputHeight[6];