diff --git a/js/src/gc/Nursery.h b/js/src/gc/Nursery.h
index 5301cfb858..0cf4009107 100644
--- a/js/src/gc/Nursery.h
+++ b/js/src/gc/Nursery.h
@@ -510,7 +510,7 @@ class Nursery
     void* allocate(size_t size);
 
     void doCollection(JS::gcreason::Reason reason,
-                        gc::AutoTraceSession& sesssion,
+                        gc::AutoTraceSession& session,
                         gc::TenureCountCache& tenureCounts);
 
     /*