diff --git a/lib/libvgl/main.c b/lib/libvgl/main.c
index 635c29c6194..c5b324cf574 100644
--- a/lib/libvgl/main.c
+++ b/lib/libvgl/main.c
@@ -176,9 +176,11 @@ VGLInit(int mode)
       return -4;
     }
     VGLDisplay->Type = VIDBUF8;
+    VGLDisplay->PixelBytes = 1;
     break;
   case V_INFO_MM_VGAX:
     VGLDisplay->Type = VIDBUF8X;
+    VGLDisplay->PixelBytes = 1;
     break;
   case V_INFO_MM_DIRECT:
     VGLDisplay->PixelBytes = VGLModeInfo.vi_pixel_size;