diff --git a/wp-includes/ms-deprecated.php b/wp-includes/ms-deprecated.php
index 0e096921c6..32dd62a416 100644
--- a/wp-includes/ms-deprecated.php
+++ b/wp-includes/ms-deprecated.php
@@ -23,4 +23,37 @@ function generate_random_password( $len = 8 ) {
 	return wp_generate_password($len);
 }
 
+/**
+ * Determine if user is a site admin.
+ *
+ * Plugins should use is_multisite() instead of checking if this function exists
+ * to determine if multisite is enabled.
+ *
+ * This function must reside in a file included only if is_multisite() due to
+ * legacy function_exists() checks to determine if multisite is enabled.
+ *
+ * @since unknown
+ * @deprecated 3.0
+ * @deprecated Use is_super_admin()
+ * @see is_super_admin()
+ * @see is_multisite()
+ *
+ */
+function is_site_admin( $user_login = '' ) {
+	_deprecated_function( __FUNCTION__, '3.0', 'is_super_admin()' );
+
+	if ( empty( $user_login ) ) {
+		$user_id = get_current_user_id();
+		if ( !$user_id )
+			return false;
+	} else {
+		$user = new WP_User( null, $user_login) ;
+		if ( empty( $user->id ) )
+			return false;
+		$user_id = $user->id;
+	}
+
+	return is_super_admin( $user_id );
+}
+
 ?>
\ No newline at end of file
diff --git a/wp-includes/ms-functions.php b/wp-includes/ms-functions.php
index 228fd967f5..d024d69a00 100644
--- a/wp-includes/ms-functions.php
+++ b/wp-includes/ms-functions.php
@@ -183,30 +183,6 @@ function get_current_user_id() {
 	return $current_user->ID;
 }
 
-/**
- * Determine if user is a site admin.
- *
- * @deprecated Use {@link is_keymaster()}
- *
- */
-function is_site_admin( $user_login = '' ) {
-	// This function must reside in a file included only if is_multsite() since many plugins
-	// test for its existence to determine if multisite is enabled.
-
-	if ( empty($user_login) ) {
-		$user_id = get_current_user_id();
-		if ( !$user_id )
-			return false;
-	} else {
-		$user = new WP_User(null, $user_login);
-		if ( empty($user->id) )
-			return false;
-		$user_id = $user->id;
-	}
-
-	return is_super_admin($user_id);
-}
-
 /**
  * Retrieve option value based on setting name and blog_id.
  *