diff --git a/crates/swc_ecma_usage_analyzer/src/util.rs b/crates/swc_ecma_usage_analyzer/src/util.rs
index 1f8e0758b2c0..fc02f1041adb 100644
--- a/crates/swc_ecma_usage_analyzer/src/util.rs
+++ b/crates/swc_ecma_usage_analyzer/src/util.rs
@@ -39,6 +39,7 @@ pub fn is_global_var_with_pure_property_access(s: &str) -> bool {
             | "NaN"
             | "Symbol"
             | "Promise"
+            | "WeakRef"
     )
 }