diff --git a/mach/m68020/libem/csa.s b/mach/m68020/libem/csa.s
index 1e16c730b..2cec60e00 100644
--- a/mach/m68020/libem/csa.s
+++ b/mach/m68020/libem/csa.s
@@ -14,7 +14,9 @@
 	blt	1f
 	cmp.l	(a0)+, d0	! rel. index, upper - lower bound
 	bgt	1f
-	move.l	(a0,d0.l*4), a1	! jump address
+	move.l	(a0,d0.l*4), d1	! jump address
+	beq	1f
+	move.l	d1,a1
 1:
 	move.l	a1, d0
 	beq	2f