Index: sys/dev/tc/sfb.c
===================================================================
RCS file: /cvsroot/src/sys/dev/tc/sfb.c,v
retrieving revision 1.89
diff -u -p -r1.89 sfb.c
--- sys/dev/tc/sfb.c	6 Dec 2021 16:00:07 -0000	1.89
+++ sys/dev/tc/sfb.c	16 Nov 2025 23:18:11 -0000
@@ -487,7 +487,7 @@ sfbmmap(void *v, void *vs, off_t offset,
 
 	if (offset >= SFB_SIZE || offset < 0)
 		return (-1);
-	return machine_btop(sc->sc_vaddr + offset);
+	return machine_btop(sc->sc_vaddr + SFB_FB_OFFSET + offset);
 }
 
 static int
Index: sys/dev/tc/sfbplus.c
===================================================================
RCS file: /cvsroot/src/sys/dev/tc/sfbplus.c,v
retrieving revision 1.42
diff -u -p -r1.42 sfbplus.c
--- sys/dev/tc/sfbplus.c	6 Dec 2021 17:43:50 -0000	1.42
+++ sys/dev/tc/sfbplus.c	16 Nov 2025 23:18:11 -0000
@@ -509,7 +509,7 @@ sfbmmap(void *v, void *vs, off_t offset,
 
 	if (offset >= 0x1000000 || offset < 0) /* XXX 16MB XXX */
 		return (-1);
-	return machine_btop(sc->sc_vaddr + offset);
+	return machine_btop(sc->sc_vaddr + SFB_FB_OFFSET + offset);
 }
 
 static int