diff --git a/js/src/gc/Nursery.cpp b/js/src/gc/Nursery.cpp
index bf3c2f74984..bcaf9ecbf98 100644
--- a/js/src/gc/Nursery.cpp
+++ b/js/src/gc/Nursery.cpp
@@ -492,6 +492,7 @@ js::Nursery::collect(JSRuntime *rt, JS::gcreason::Reason reason)
         comp->markAllInitialShapeTableEntries(&trc);
     }
     markStoreBuffer(&trc);
+    rt->newObjectCache.clearNurseryObjects(rt);
 
     /*
      * Most of the work is done here. This loop iterates over objects that have
diff --git a/js/src/jscntxt.h b/js/src/jscntxt.h
index 918e7716340..2f5acb50937 100644
--- a/js/src/jscntxt.h
+++ b/js/src/jscntxt.h
@@ -338,6 +338,9 @@ class NewObjectCache
     NewObjectCache() { mozilla::PodZero(this); }
     void purge() { mozilla::PodZero(this); }
 
+    /* Remove any cached items keyed on moved objects. */
+    inline void clearNurseryObjects(JSRuntime *rt);
+
     /*
      * Get the entry index for the given lookup, return whether there was a hit
      * on an existing entry.
diff --git a/js/src/jscntxtinlines.h b/js/src/jscntxtinlines.h
index 6384cade797..1d15a4c5a6b 100644
--- a/js/src/jscntxtinlines.h
+++ b/js/src/jscntxtinlines.h
@@ -29,6 +29,15 @@ NewObjectCache::staticAsserts()
     JS_STATIC_ASSERT(gc::FINALIZE_OBJECT_LAST == gc::FINALIZE_OBJECT16_BACKGROUND);
 }
 
+inline void
+NewObjectCache::clearNurseryObjects(JSRuntime *rt)
+{
+    for (unsigned i = 0; i < mozilla::ArrayLength(entries); ++i) {
+        if (IsInsideNursery(rt, entries[i].key))
+            mozilla::PodZero(&entries[i]);
+    }
+}
+
 inline bool
 NewObjectCache::lookup(Class *clasp, gc::Cell *key, gc::AllocKind kind, EntryIndex *pentry)
 {