diff --git a/crates/ty_python_semantic/resources/mdtest/protocols.md b/crates/ty_python_semantic/resources/mdtest/protocols.md
index 14eee12406..6fbda7553a 100644
--- a/crates/ty_python_semantic/resources/mdtest/protocols.md
+++ b/crates/ty_python_semantic/resources/mdtest/protocols.md
@@ -389,7 +389,7 @@ To see the kinds and types of the protocol members, you can use the debugging ai
 
 ```py
 from ty_extensions import reveal_protocol_interface
-from typing import SupportsIndex, SupportsAbs
+from typing import SupportsIndex, SupportsAbs, ClassVar
 
 # error: [revealed-type] "Revealed protocol interface: `{"method_member": MethodMember(`(self) -> bytes`), "x": AttributeMember(`int`), "y": PropertyMember { get_type: `str` }, "z": PropertyMember { get_type: `int`, set_type: `int` }}`"
 reveal_protocol_interface(Foo)
@@ -419,6 +419,12 @@ reveal_protocol_interface(BaseProto)
 
 # error: [revealed-type] "Revealed protocol interface: `{"member": MethodMember(`(self) -> bool`)}`"
 reveal_protocol_interface(SubProto)
+
+class ProtoWithClassVar(Protocol):
+    x: ClassVar[int]
+
+# error: [revealed-type] "Revealed protocol interface: `{"x": AttributeMember(`int`; ClassVar)}`"
+reveal_protocol_interface(ProtoWithClassVar)
 ```
 
 Certain special attributes and methods are not considered protocol members at runtime, and should
diff --git a/crates/ty_python_semantic/src/types/protocol_class.rs b/crates/ty_python_semantic/src/types/protocol_class.rs
index 493bb4e10d..f18c11c088 100644
--- a/crates/ty_python_semantic/src/types/protocol_class.rs
+++ b/crates/ty_python_semantic/src/types/protocol_class.rs
@@ -8,8 +8,9 @@ use rustc_hash::FxHashMap;
 
 use super::TypeVarVariance;
 use crate::semantic_index::place_table;
-use crate::types::signatures::ParameterForm;
-use crate::types::{AttributeAssignmentError, CallArguments, HasRelationToVisitor, UnionType};
+use crate::types::{
+    AttributeAssignmentError, CallArguments, HasRelationToVisitor, Signature, UnionType,
+};
 use crate::{
     Db, FxOrderSet,
     place::{Boundness, Place, PlaceAndQualifiers, place_from_bindings, place_from_declarations},
@@ -294,6 +295,7 @@ impl<'db> ProtocolMemberData<'db> {
         struct ProtocolMemberDataDisplay<'a, 'db> {
             db: &'db dyn Db,
             data: &'a ProtocolMemberKind<'db>,
+            qualifiers: TypeQualifiers,
         }
 
         impl std::fmt::Display for ProtocolMemberDataDisplay<'_, '_> {
@@ -312,8 +314,16 @@ impl<'db> ProtocolMemberData<'db> {
                         }
                         d.finish()
                     }
-                    ProtocolMemberKind::Attribute(attribute) => {
-                        write!(f, "AttributeMember(`{}`)", attribute.ty.display(self.db))
+                    ProtocolMemberKind::Attribute(AttributeMember {
+                        ty,
+                        bound_on_class: _,
+                    }) => {
+                        f.write_str("AttributeMember(")?;
+                        write!(f, "`{}`", ty.display(self.db))?;
+                        if self.qualifiers.contains(TypeQualifiers::CLASS_VAR) {
+                            f.write_str("; ClassVar")?;
+                        }
+                        f.write_char(')')
                     }
                 }
             }
@@ -322,6 +332,7 @@ impl<'db> ProtocolMemberData<'db> {
         ProtocolMemberDataDisplay {
             db,
             data: &self.kind,
+            qualifiers: self.qualifiers,
         }
     }
 }
@@ -354,21 +365,17 @@ impl<'db> PropertyMember<'db> {
             _ => return None,
         };
 
+        let set_type_from_signature = |sig: &Signature<'db>| match sig.parameters().as_slice() {
+            [_, parameter] if parameter.is_positional() && parameter.form.is_value() => {
+                Some(parameter.annotated_type().unwrap_or_else(Type::unknown))
+            }
+            _ => None,
+        };
+
         let set_type = if let Some(signature) = setter_signature {
-            if let Some(ty) = UnionType::try_from_elements(
-                db,
-                signature
-                    .iter()
-                    .map(|sig| match sig.parameters().as_slice() {
-                        [_, parameter]
-                            if parameter.is_positional()
-                                && parameter.form == ParameterForm::Value =>
-                        {
-                            Some(parameter.annotated_type().unwrap_or_else(Type::unknown))
-                        }
-                        _ => None,
-                    }),
-            ) {
+            if let Some(ty) =
+                UnionType::try_from_elements(db, signature.iter().map(set_type_from_signature))
+            {
                 Some(ty)
             } else {
                 return None;
diff --git a/crates/ty_python_semantic/src/types/signatures.rs b/crates/ty_python_semantic/src/types/signatures.rs
index 11ca44bb8f..0ffbe921cc 100644
--- a/crates/ty_python_semantic/src/types/signatures.rs
+++ b/crates/ty_python_semantic/src/types/signatures.rs
@@ -1594,6 +1594,13 @@ pub(crate) enum ParameterForm {
     Type,
 }
 
+impl ParameterForm {
+    /// Returns `true` if this is a value form.
+    pub(crate) const fn is_value(self) -> bool {
+        matches!(self, Self::Value)
+    }
+}
+
 #[cfg(test)]
 mod tests {
     use super::*;