diff --git a/src/objects-inl.h b/src/objects-inl.h
index 4d21017..1852b54 100644
--- a/src/objects-inl.h
+++ b/src/objects-inl.h
@@ -1952,7 +1952,9 @@
 void JSFunctionResultCache::Clear() {
   int cache_size = Smi::cast(get(kCacheSizeIndex))->value();
   Object** entries_start = RawField(this, OffsetOfElementAt(kEntriesIndex));
-  MemsetPointer(entries_start, Heap::the_hole_value(), cache_size);
+  MemsetPointer(entries_start,
+                Heap::the_hole_value(),
+                cache_size - kEntriesIndex);
   MakeZeroSize();
 }