diff --git a/js/src/gc/Nursery.cpp b/js/src/gc/Nursery.cpp
index bce2b74aa5..aa50bf29e5 100644
--- a/js/src/gc/Nursery.cpp
+++ b/js/src/gc/Nursery.cpp
@@ -121,6 +121,13 @@ js::Nursery::Nursery(JSRuntime* rt)
 bool
 js::Nursery::init(uint32_t maxNurseryBytes, AutoLockGC& lock)
 {
+    if (!mallocedBuffers.init())
+        return false;
+
+    freeMallocedBuffersTask = js_new<FreeMallocedBuffersTask>(runtime()->defaultFreeOp());
+    if (!freeMallocedBuffersTask || !freeMallocedBuffersTask->init())
+        return false;
+
     /* maxNurseryBytes parameter is rounded down to a multiple of chunk size. */
     maxNurseryChunks_ = maxNurseryBytes >> ChunkShift;
 
@@ -128,16 +135,9 @@ js::Nursery::init(uint32_t maxNurseryBytes, AutoLockGC& lock)
     if (maxNurseryChunks_ == 0)
         return true;
 
-    if (!mallocedBuffers.init())
-        return false;
-
     if (!cellsWithUid_.init())
         return false;
 
-    freeMallocedBuffersTask = js_new<FreeMallocedBuffersTask>(runtime()->defaultFreeOp());
-    if (!freeMallocedBuffersTask || !freeMallocedBuffersTask->init())
-        return false;
-
     AutoMaybeStartBackgroundAllocation maybeBgAlloc;
     updateNumChunksLocked(1, maybeBgAlloc, lock);
     if (numChunks() == 0)