diff --git a/dom/ipc/ProcessPriorityManager.cpp b/dom/ipc/ProcessPriorityManager.cpp
index 8f415819813c..a0411477a7ec 100644
--- a/dom/ipc/ProcessPriorityManager.cpp
+++ b/dom/ipc/ProcessPriorityManager.cpp
@@ -1045,6 +1045,7 @@ ProcessPriorityManagerChild::StaticInit()
 {
   if (!sSingleton) {
     sSingleton = new ProcessPriorityManagerChild();
+    sSingleton->Init();
     ClearOnShutdown(&sSingleton);
   }
 }