diff --git a/lib/node_modules/@stdlib/_tools/repl-txt/rules/doctest/lib/main.js b/lib/node_modules/@stdlib/_tools/repl-txt/rules/doctest/lib/main.js
index 64b64e6151ee..b775d0e6b3cc 100644
--- a/lib/node_modules/@stdlib/_tools/repl-txt/rules/doctest/lib/main.js
+++ b/lib/node_modules/@stdlib/_tools/repl-txt/rules/doctest/lib/main.js
@@ -171,7 +171,7 @@ function main( context ) {
 			var o;
 			var i;
 
-			alias = pkg2alias( pkg );
+			alias = pkg2alias( pkg ) || 'ALIAS';
 			alias = alias.split( '.' );
 			len = alias.length;