diff --git a/target-arm/helper.c b/target-arm/helper.c
index 3445813465..c3e491006f 100644
--- a/target-arm/helper.c
+++ b/target-arm/helper.c
@@ -546,7 +546,7 @@ static int pmintenclr_write(CPUARMState *env, const ARMCPRegInfo *ri,
 static int vbar_write(CPUARMState *env, const ARMCPRegInfo *ri,
                       uint64_t value)
 {
-    env->cp15.c12_vbar = value & ~0x1Ful;
+    env->cp15.c12_vbar = value & ~0x1FULL;
     return 0;
 }