diff --git a/src/main.cc b/src/main.cc
index d3afc0af..39f5a4ec 100644
--- a/src/main.cc
+++ b/src/main.cc
@@ -455,6 +455,9 @@ int main(int argc, char* argv[])
     shell_manager.register_env_var("bufname",
                                    [](const Context& context)
                                    { return context.buffer().name(); });
+    shell_manager.register_env_var("selection",
+                                   [](const Context& context)
+                                   { return context.window().selections_content().back(); });
     register_commands();
     register_highlighters();
     register_filters();