diff --git a/js/src/jit/IonFrames.cpp b/js/src/jit/IonFrames.cpp
index 5961492a6bcb..1be264897418 100644
--- a/js/src/jit/IonFrames.cpp
+++ b/js/src/jit/IonFrames.cpp
@@ -1238,14 +1238,6 @@ MarkJitActivations(JSRuntime *rt, JSTracer *trc)
         MarkJitActivation(trc, activations);
 }
 
-JSCompartment *
-TopmostJitActivationCompartment(JSRuntime *rt)
-{
-    for (JitActivationIterator activations(rt); !activations.done(); ++activations)
-        return activations.activation()->compartment();
-    return nullptr;
-}
-
 #ifdef JSGC_GENERATIONAL
 void
 UpdateJitActivationsForMinorGC(JSRuntime *rt, JSTracer *trc)
diff --git a/js/src/jit/IonFrames.h b/js/src/jit/IonFrames.h
index 49e0d7c31904..e24a0db6fb35 100644
--- a/js/src/jit/IonFrames.h
+++ b/js/src/jit/IonFrames.h
@@ -268,9 +268,6 @@ void EnsureExitFrame(IonCommonFrameLayout *frame);
 void MarkJitActivations(JSRuntime *rt, JSTracer *trc);
 void MarkIonCompilerRoots(JSTracer *trc);
 
-JSCompartment *
-TopmostJitActivationCompartment(JSRuntime *rt);
-
 #ifdef JSGC_GENERATIONAL
 void UpdateJitActivationsForMinorGC(JSRuntime *rt, JSTracer *trc);
 #endif
diff --git a/js/src/jsgc.cpp b/js/src/jsgc.cpp
index b8f518bd9d48..3a34e1261002 100644
--- a/js/src/jsgc.cpp
+++ b/js/src/jsgc.cpp
@@ -2852,13 +2852,6 @@ BeginMarkPhase(JSRuntime *rt)
             c->zone()->setPreservingCode(true);
     }
 
-    if (!rt->gc.shouldCleanUpEverything) {
-#ifdef JS_ION
-        if (JSCompartment *comp = jit::TopmostJitActivationCompartment(rt))
-            comp->zone()->setPreservingCode(true);
-#endif
-    }
-
     /*
      * Atoms are not in the cross-compartment map. So if there are any
      * zones that are not being collected, we are not allowed to collect