diff --git a/src/icon_theme.rs b/src/icon_theme.rs
index 4a25d615..6d8dfc89 100644
--- a/src/icon_theme.rs
+++ b/src/icon_theme.rs
@@ -3,20 +3,21 @@
 
 //! Select the preferred icon theme.
 
+use std::borrow::Cow;
 use std::cell::RefCell;
 
 thread_local! {
     /// The fallback icon theme to search if no icon theme was specified.
-    pub(crate) static DEFAULT: RefCell<String> = RefCell::new(String::from("Cosmic"));
+    pub(crate) static DEFAULT: RefCell<Cow<'static, str>> = RefCell::new("Cosmic".into());
 }
 
 /// The fallback icon theme to search if no icon theme was specified.
 #[must_use]
 pub fn default() -> String {
-    DEFAULT.with(|f| f.borrow().clone())
+    DEFAULT.with(|theme| theme.borrow().to_string())
 }
 
 /// Set the fallback icon theme to search when loading system icons.
-pub fn set_default(name: impl Into<String>) {
-    DEFAULT.with(|f| *f.borrow_mut() = name.into());
+pub fn set_default(name: impl Into<Cow<'static, str>>) {
+    DEFAULT.with(|theme| *theme.borrow_mut() = name.into());
 }