diff --git a/include/types.hrl b/include/types.hrl
index 7fe9f0a5..bdd4c5f8 100644
--- a/include/types.hrl
+++ b/include/types.hrl
@@ -25,7 +25,7 @@
 -type port_number() :: 0..65535.
 
 -type bindings() :: list({Key::atom(), Value::string()}).
--type path_tokens() :: list(string()).
+-type path_tokens() :: list(nonempty_string()).
 -type match() :: '_' | '*' | list(string() | '_' | atom()).
 
 -type dispatch_rules() :: {Host::match(), list({Path::match(),