diff --git a/src/mcp/client/session.py b/src/mcp/client/session.py
index 02a4e8e01..0ba46fe5b 100644
--- a/src/mcp/client/session.py
+++ b/src/mcp/client/session.py
@@ -302,7 +302,7 @@ async def get_prompt(self, name: str, arguments: dict[str, str] | None = None) -
 
     async def complete(
         self,
-        ref: types.ResourceReference | types.PromptReference,
+        ref: types.ResourceTemplateReference | types.PromptReference,
         argument: dict[str, str],
     ) -> types.CompleteResult:
         """Send a completion/complete request."""
diff --git a/src/mcp/server/lowlevel/server.py b/src/mcp/server/lowlevel/server.py
index 7a24781ab..b077339fb 100644
--- a/src/mcp/server/lowlevel/server.py
+++ b/src/mcp/server/lowlevel/server.py
@@ -431,7 +431,7 @@ def completion(self):
         def decorator(
             func: Callable[
                 [
-                    types.PromptReference | types.ResourceReference,
+                    types.PromptReference | types.ResourceTemplateReference,
                     types.CompletionArgument,
                 ],
                 Awaitable[types.Completion | None],
diff --git a/src/mcp/types.py b/src/mcp/types.py
index 824cee73c..e1f8ea52f 100644
--- a/src/mcp/types.py
+++ b/src/mcp/types.py
@@ -3,6 +3,7 @@
 
 from pydantic import BaseModel, ConfigDict, Field, FileUrl, RootModel
 from pydantic.networks import AnyUrl, UrlConstraints
+from typing_extensions import deprecated
 
 """
 Model Context Protocol bindings for Python
@@ -961,7 +962,7 @@ class CreateMessageResult(Result):
     """The reason why sampling stopped, if known."""
 
 
-class ResourceReference(BaseModel):
+class ResourceTemplateReference(BaseModel):
     """A reference to a resource or resource template definition."""
 
     type: Literal["ref/resource"]
@@ -970,6 +971,11 @@ class ResourceReference(BaseModel):
     model_config = ConfigDict(extra="allow")
 
 
+@deprecated("`ResourceReference` is deprecated, you should use `ResourceTemplateReference`.")
+class ResourceReference(ResourceTemplateReference):
+    pass
+
+
 class PromptReference(BaseModel):
     """Identifies a prompt."""
 
@@ -992,7 +998,7 @@ class CompletionArgument(BaseModel):
 class CompleteRequestParams(RequestParams):
     """Parameters for completion requests."""
 
-    ref: ResourceReference | PromptReference
+    ref: ResourceTemplateReference | PromptReference
     argument: CompletionArgument
     model_config = ConfigDict(extra="allow")