diff --git a/src/include/86box/vid_svga.h b/src/include/86box/vid_svga.h
index ca7ae4c21..4da5d924e 100644
--- a/src/include/86box/vid_svga.h
+++ b/src/include/86box/vid_svga.h
@@ -124,7 +124,7 @@ typedef struct svga_t
     int override;
     void *p;
 
-    uint8_t crtc[128], gdcreg[64], attrregs[32], seqregs[64],
+    uint8_t crtc[256], gdcreg[64], attrregs[32], seqregs[64],
 	    egapal[16],
 	    *vram, *changedvram;