diff --git a/compiler/utils/x86/assembler_x86.cc b/compiler/utils/x86/assembler_x86.cc
index 136d248..1616502 100644
--- a/compiler/utils/x86/assembler_x86.cc
+++ b/compiler/utils/x86/assembler_x86.cc
@@ -1553,6 +1553,9 @@
   X86ManagedRegister dest = mdest.AsX86();
   CHECK(dest.IsCpuRegister() && dest.IsCpuRegister());
   movl(dest.AsCpuRegister(), Address(base.AsX86().AsCpuRegister(), offs));
+  if (kPoisonHeapReferences) {
+    negl(dest.AsCpuRegister());
+  }
 }
 
 void X86Assembler::LoadRawPtr(ManagedRegister mdest, ManagedRegister base,