diff --git a/builtin/credential/radius/backend_test.go b/builtin/credential/radius/backend_test.go
index 3c885008422a..3d83f23674ce 100644
--- a/builtin/credential/radius/backend_test.go
+++ b/builtin/credential/radius/backend_test.go
@@ -185,7 +185,8 @@ func TestBackend_users(t *testing.T) {
 			testStepUpdateUser(t, "web", "foo"),
 			testStepUpdateUser(t, "web2", "foo"),
 			testStepUpdateUser(t, "web3", "foo"),
-			testStepUserList(t, []string{"web", "web2", "web3"}),
+			testStepUpdateUser(t, "Web4", "foo"),
+			testStepUserList(t, []string{"Web4", "web", "web2", "web3"}),
 		},
 	})
 }
diff --git a/builtin/credential/radius/path_users.go b/builtin/credential/radius/path_users.go
index 21ebd262f0d7..3ba81b792790 100644
--- a/builtin/credential/radius/path_users.go
+++ b/builtin/credential/radius/path_users.go
@@ -6,7 +6,6 @@ package radius
 import (
 	"context"
 	"fmt"
-	"strings"
 
 	"github.com/hashicorp/vault/sdk/framework"
 	"github.com/hashicorp/vault/sdk/helper/policyutil"
@@ -87,7 +86,7 @@ func (b *backend) user(ctx context.Context, s logical.Storage, username string)
 		return nil, fmt.Errorf("missing username")
 	}
 
-	entry, err := s.Get(ctx, "user/"+strings.ToLower(username))
+	entry, err := s.Get(ctx, "user/"+username)
 	if err != nil {
 		return nil, err
 	}
diff --git a/changelog/28884.txt b/changelog/28884.txt
new file mode 100644
index 000000000000..c9b064d217f5
--- /dev/null
+++ b/changelog/28884.txt
@@ -0,0 +1,3 @@
+```release-note:bug
+auth/radius: Fixed and issue where upper case items were returning as lower case.
+```
\ No newline at end of file