diff --git a/aws/middleware/recursion_detection.go b/aws/middleware/recursion_detection.go
index a1a7cf1ea2f..3f6aaf231e1 100644
--- a/aws/middleware/recursion_detection.go
+++ b/aws/middleware/recursion_detection.go
@@ -9,8 +9,8 @@ import (
 )
 
 const envAwsLambdaFunctionName = "AWS_LAMBDA_FUNCTION_NAME"
-const envAmznTraceId = "_X_AMZN_TRACE_ID"
-const amznTraceIdHeader = "X-Amzn-Trace-Id"
+const envAmznTraceID = "_X_AMZN_TRACE_ID"
+const amznTraceIDHeader = "X-Amzn-Trace-Id"
 
 // AddRecursionDetection adds recursionDetection to the middleware stack
 func AddRecursionDetection(stack *middleware.Stack) error {
@@ -38,15 +38,15 @@ func (m *RecursionDetection) HandleBuild(
 	}
 
 	_, hasLambdaEnv := os.LookupEnv(envAwsLambdaFunctionName)
-	xAmznTraceID, hasTraceID := os.LookupEnv(envAmznTraceId)
-	value := req.Header.Get(amznTraceIdHeader)
+	xAmznTraceID, hasTraceID := os.LookupEnv(envAmznTraceID)
+	value := req.Header.Get(amznTraceIDHeader)
 	// only set the X-Amzn-Trace-Id header when it is not set initially, the
 	// current environment is Lambda and the _X_AMZN_TRACE_ID env variable exists
 	if value != "" || !hasLambdaEnv || !hasTraceID {
 		return next.HandleBuild(ctx, in)
 	}
 
-	req.Header.Set(amznTraceIdHeader, percentEncode(xAmznTraceID))
+	req.Header.Set(amznTraceIDHeader, percentEncode(xAmznTraceID))
 	return next.HandleBuild(ctx, in)
 }
 
diff --git a/aws/middleware/recursion_detection_test.go b/aws/middleware/recursion_detection_test.go
index 64e79c5eb68..0f4122231a2 100644
--- a/aws/middleware/recursion_detection_test.go
+++ b/aws/middleware/recursion_detection_test.go
@@ -49,11 +49,11 @@ func TestRecursionDetection(t *testing.T) {
 			defer restoreEnv()
 
 			setEnvVar(t, envAwsLambdaFunctionName, c.LambdaFuncName)
-			setEnvVar(t, envAmznTraceId, c.TraceID)
+			setEnvVar(t, envAmznTraceID, c.TraceID)
 
 			req := smithyhttp.NewStackRequest().(*smithyhttp.Request)
 			if c.HeaderBefore != "" {
-				req.Header.Set(amznTraceIdHeader, c.HeaderBefore)
+				req.Header.Set(amznTraceIDHeader, c.HeaderBefore)
 			}
 			var updatedRequest *smithyhttp.Request
 			m := RecursionDetection{}
@@ -69,7 +69,7 @@ func TestRecursionDetection(t *testing.T) {
 				t.Fatalf("expect no error, got %v", err)
 			}
 
-			if e, a := c.HeaderAfter, updatedRequest.Header.Get(amznTraceIdHeader); e != a {
+			if e, a := c.HeaderAfter, updatedRequest.Header.Get(amznTraceIDHeader); e != a {
 				t.Errorf("expect header value %v found, got %v", e, a)
 			}
 		})