diff --git a/plugin/ochttp/trace.go b/plugin/ochttp/trace.go
index c23b97fb1..53e71305a 100644
--- a/plugin/ochttp/trace.go
+++ b/plugin/ochttp/trace.go
@@ -186,6 +186,8 @@ func TraceStatus(httpStatusCode int, statusLine string) trace.Status {
 		code = trace.StatusCodeCancelled
 	case http.StatusBadRequest:
 		code = trace.StatusCodeInvalidArgument
+	case http.StatusUnprocessableEntity:
+		code = trace.StatusCodeInvalidArgument
 	case http.StatusGatewayTimeout:
 		code = trace.StatusCodeDeadlineExceeded
 	case http.StatusNotFound:
diff --git a/plugin/ochttp/trace_test.go b/plugin/ochttp/trace_test.go
index 13ef30cab..e1d13d155 100644
--- a/plugin/ochttp/trace_test.go
+++ b/plugin/ochttp/trace_test.go
@@ -668,6 +668,9 @@ func TestStatusUnitTest(t *testing.T) {
 		{204, trace.Status{Code: trace.StatusCodeOK, Message: `OK`}},
 		{100, trace.Status{Code: trace.StatusCodeUnknown, Message: `UNKNOWN`}},
 		{500, trace.Status{Code: trace.StatusCodeUnknown, Message: `UNKNOWN`}},
+		{400, trace.Status{Code: trace.StatusCodeInvalidArgument, Message: `INVALID_ARGUMENT`}},
+		{422, trace.Status{Code: trace.StatusCodeInvalidArgument, Message: `INVALID_ARGUMENT`}},
+		{499, trace.Status{Code: trace.StatusCodeCancelled, Message: `CANCELLED`}},
 		{404, trace.Status{Code: trace.StatusCodeNotFound, Message: `NOT_FOUND`}},
 		{600, trace.Status{Code: trace.StatusCodeUnknown, Message: `UNKNOWN`}},
 		{401, trace.Status{Code: trace.StatusCodeUnauthenticated, Message: `UNAUTHENTICATED`}},