diff --git a/src/internal/runtime/sys/dit_arm64.s b/src/internal/runtime/sys/dit_arm64.s
index c27dfc9af3c..408b60c8c0a 100644
--- a/src/internal/runtime/sys/dit_arm64.s
+++ b/src/internal/runtime/sys/dit_arm64.s
@@ -9,6 +9,11 @@ TEXT ·EnableDIT(SB),$0-1
     UBFX $24, R0, $1, R1
     MOVB R1, ret+0(FP)
     MSR $1, DIT
+    // TODO(roland): the SB instruction is significantly more
+    // performant when available. We should detect its availability
+    // and use it when we can.
+    DSB $7  // nsh
+    ISB $15 // sy
     RET
 
 TEXT ·DITEnabled(SB),$0-1