diff --git a/src/arch/alpha/decoder.hh b/src/arch/alpha/decoder.hh
index 45e737e52..d33722867 100644
--- a/src/arch/alpha/decoder.hh
+++ b/src/arch/alpha/decoder.hh
@@ -83,6 +83,8 @@ class Decoder
         return instDone;
     }
 
+    void takeOverFrom(Decoder * old) {}
+
   protected:
     /// A cache of decoded instruction objects.
     static GenericISA::BasicDecodeCache defaultCache;
diff --git a/src/arch/arm/decoder.hh b/src/arch/arm/decoder.hh
index 83a16da4c..72776bcfd 100644
--- a/src/arch/arm/decoder.hh
+++ b/src/arch/arm/decoder.hh
@@ -116,6 +116,8 @@ class Decoder
         fpscrStride = fpscr.stride;
     }
 
+    void takeOverFrom(Decoder *old) {}
+
   protected:
     /// A cache of decoded instruction objects.
     static GenericISA::BasicDecodeCache defaultCache;
diff --git a/src/arch/mips/decoder.hh b/src/arch/mips/decoder.hh
index 080614dee..a3a68ad07 100644
--- a/src/arch/mips/decoder.hh
+++ b/src/arch/mips/decoder.hh
@@ -83,6 +83,8 @@ class Decoder
         return instDone;
     }
 
+    void takeOverFrom(Decoder *old) {}
+
   protected:
     /// A cache of decoded instruction objects.
     static GenericISA::BasicDecodeCache defaultCache;
diff --git a/src/arch/power/decoder.hh b/src/arch/power/decoder.hh
index 830636aed..a70802ced 100644
--- a/src/arch/power/decoder.hh
+++ b/src/arch/power/decoder.hh
@@ -89,6 +89,9 @@ class Decoder
     {
         return instDone;
     }
+
+    void takeOverFrom(Decoder *old) {}
+
   protected:
     /// A cache of decoded instruction objects.
     static GenericISA::BasicDecodeCache defaultCache;
diff --git a/src/arch/sparc/decoder.hh b/src/arch/sparc/decoder.hh
index e7a806d81..b87ee682e 100644
--- a/src/arch/sparc/decoder.hh
+++ b/src/arch/sparc/decoder.hh
@@ -97,6 +97,8 @@ class Decoder
         asi = _asi;
     }
 
+    void takeOverFrom(Decoder *old) {}
+
   protected:
     /// A cache of decoded instruction objects.
     static GenericISA::BasicDecodeCache defaultCache;
diff --git a/src/arch/x86/decoder.hh b/src/arch/x86/decoder.hh
index 6f55ab26f..ca7ef96fe 100644
--- a/src/arch/x86/decoder.hh
+++ b/src/arch/x86/decoder.hh
@@ -250,6 +250,19 @@ class Decoder
         }
     }
 
+    void takeOverFrom(Decoder *old)
+    {
+        mode = old->mode;
+        submode = old->submode;
+        emi.mode.mode = mode;
+        emi.mode.submode = submode;
+        altOp = old->altOp;
+        defOp = old->defOp;
+        altAddr = old->altAddr;
+        defAddr = old->defAddr;
+        stack = old->stack;
+    }
+
     void reset()
     {
         state = ResetState;
diff --git a/src/cpu/o3/thread_context_impl.hh b/src/cpu/o3/thread_context_impl.hh
index 6de5c5731..f818cc3dc 100755
--- a/src/cpu/o3/thread_context_impl.hh
+++ b/src/cpu/o3/thread_context_impl.hh
@@ -67,6 +67,9 @@ void
 O3ThreadContext<Impl>::takeOverFrom(ThreadContext *old_context)
 {
     ::takeOverFrom(*this, *old_context);
+    TheISA::Decoder *newDecoder = getDecoderPtr();
+    TheISA::Decoder *oldDecoder = old_context->getDecoderPtr();
+    newDecoder->takeOverFrom(oldDecoder);
 
     thread->kernelStats = old_context->getKernelStats();
     thread->funcExeInst = old_context->readFuncExeInst();
diff --git a/src/cpu/simple_thread.cc b/src/cpu/simple_thread.cc
index 77569aa68..de01124e0 100644
--- a/src/cpu/simple_thread.cc
+++ b/src/cpu/simple_thread.cc
@@ -108,6 +108,7 @@ void
 SimpleThread::takeOverFrom(ThreadContext *oldContext)
 {
     ::takeOverFrom(*tc, *oldContext);
+    decoder.takeOverFrom(oldContext->getDecoderPtr());
 
     kernelStats = oldContext->getKernelStats();
     funcExeInst = oldContext->readFuncExeInst();