diff --git a/driver/xf86-video-sunffb/src/VISmoveImage.s b/driver/xf86-video-sunffb/src/VISmoveImage.s
index f30717345..82b672c75 100644
--- a/driver/xf86-video-sunffb/src/VISmoveImage.s
+++ b/driver/xf86-video-sunffb/src/VISmoveImage.s
@@ -77,6 +77,10 @@
  */
 
 #if defined(__sparc_v9__) || defined(__sparcv9) || defined(__arch64__)
+
+.register %g2, #scratch
+.register %g3, #scratch
+
 #define SMUL			mulx
 #define ICC			xcc
 #else
diff --git a/driver/xf86-video-sunffb/src/ffb_asm.s b/driver/xf86-video-sunffb/src/ffb_asm.s
index dfc59be2e..d8d9848e4 100644
--- a/driver/xf86-video-sunffb/src/ffb_asm.s
+++ b/driver/xf86-video-sunffb/src/ffb_asm.s
@@ -24,6 +24,9 @@
  */
 /* $XFree86$ */
 
+.register %g2, #scratch
+.register %g3, #scratch
+
 /* Hardware register offsets */
 #define FFB_BY		0x0060
 #define FFB_DY		0x0068