diff --git a/drivers/gpu/drm/i915/selftests/i915_request.c b/drivers/gpu/drm/i915/selftests/i915_request.c
index a9b79888c193..acae30a04a94 100644
--- a/drivers/gpu/drm/i915/selftests/i915_request.c
+++ b/drivers/gpu/drm/i915/selftests/i915_request.c
@@ -1924,7 +1924,7 @@ struct perf_stats {
 struct perf_series {
 	struct drm_i915_private *i915;
 	unsigned int nengines;
-	struct intel_context *ce[];
+	struct intel_context *ce[] __counted_by(nengines);
 };
 
 static int cmp_u32(const void *A, const void *B)