diff --git a/src/video/vid_s3.c b/src/video/vid_s3.c
index cb5d2e41e..3f64d3b3a 100644
--- a/src/video/vid_s3.c
+++ b/src/video/vid_s3.c
@@ -9254,10 +9254,12 @@ s3_pci_read(UNUSED(int func), int addr, void *priv)
             return (s3->chip == S3_TRIO64V2) ? (s3->pci_regs[0x0d] & 0xf8) : 0x00;
 
         case 0x12:
-            return (s3->chip >= S3_TRIO64V) ? 0x00 : (svga->crtc[0x5a] & 0x80);
+            return ((s3->chip == S3_VISION868) || (s3->chip == S3_VISION968) || (s3->chip >= S3_TRIO64V)) ? 0x00 :
+                       (svga->crtc[0x5a] & 0x80);
 
         case 0x13:
-            return (s3->chip >= S3_TRIO64V) ? (svga->crtc[0x59] & 0xfc) : svga->crtc[0x59];
+            return ((s3->chip == S3_VISION868) || (s3->chip == S3_VISION968) || (s3->chip >= S3_TRIO64V)) ?
+                       (svga->crtc[0x59] & 0xfc) : svga->crtc[0x59];
 
         case 0x30:
             return s3->has_bios ? (s3->pci_regs[0x30] & 0x01) : 0x00; /*BIOS ROM address*/