diff --git a/.changelog/29217.txt b/.changelog/29217.txt
new file mode 100644
index 000000000000..d0b4ae722867
--- /dev/null
+++ b/.changelog/29217.txt
@@ -0,0 +1,3 @@
+```release-note:bug
+resource/aws_appmesh_route: Fix RequiredWith setting for `spec.0.grpc_route.0.match.0.method_name` attribute
+```
diff --git a/internal/service/appmesh/route.go b/internal/service/appmesh/route.go
index e2a8f18ace2b..36df02063025 100644
--- a/internal/service/appmesh/route.go
+++ b/internal/service/appmesh/route.go
@@ -199,8 +199,9 @@ func ResourceRoute() *schema.Resource {
 												},
 
 												"method_name": {
-													Type:     schema.TypeString,
-													Optional: true,
+													Type:         schema.TypeString,
+													Optional:     true,
+													RequiredWith: []string{"spec.0.grpc_route.0.match.0.service_name"},
 												},
 
 												"prefix": {
@@ -210,9 +211,8 @@ func ResourceRoute() *schema.Resource {
 												},
 
 												"service_name": {
-													Type:         schema.TypeString,
-													Optional:     true,
-													RequiredWith: []string{"spec.0.grpc_route.0.match.0.method_name"},
+													Type:     schema.TypeString,
+													Optional: true,
 												},
 
 												"port": {