diff --git a/test/AutoDiff/IRGen/witness_table_differentiable_requirements.sil b/test/AutoDiff/IRGen/witness_table_differentiable_requirements.sil
index 305180618a892..a800eda5d3f8f 100644
--- a/test/AutoDiff/IRGen/witness_table_differentiable_requirements.sil
+++ b/test/AutoDiff/IRGen/witness_table_differentiable_requirements.sil
@@ -1,4 +1,5 @@
 // RUN: %target-swift-frontend -parse-sil %s -emit-ir | %FileCheck %s
+// REQUIRES: CPU=x86_64
 
 sil_stage canonical