diff --git a/src/cpu/base.hh b/src/cpu/base.hh
index 00373a6..dfee21f 100644
--- a/src/cpu/base.hh
+++ b/src/cpu/base.hh
@@ -158,7 +158,7 @@
      *
      * @return a reference to the data port
      */
-    virtual MasterPort &getDataPort() = 0;
+    virtual Port &getDataPort() = 0;
 
     /**
      * Returns a sendFunctional delegate for use with port proxies.
@@ -166,8 +166,9 @@
     virtual PortProxy::SendFunctionalFunc
     getSendFunctional()
     {
-        MasterPort &port = getDataPort();
-        return [&port](PacketPtr pkt)->void { port.sendFunctional(pkt); };
+        auto port = dynamic_cast<MasterPort *>(&getDataPort());
+        assert(port);
+        return [port](PacketPtr pkt)->void { port->sendFunctional(pkt); };
     }
 
     /**
@@ -176,7 +177,7 @@
      *
      * @return a reference to the instruction port
      */
-    virtual MasterPort &getInstPort() = 0;
+    virtual Port &getInstPort() = 0;
 
     /** Reads this CPU's ID. */
     int cpuId() const { return _cpuId; }
diff --git a/src/cpu/checker/cpu.hh b/src/cpu/checker/cpu.hh
index 66632b7..440fe81 100644
--- a/src/cpu/checker/cpu.hh
+++ b/src/cpu/checker/cpu.hh
@@ -105,7 +105,8 @@
 
     void setDcachePort(MasterPort *dcache_port);
 
-    MasterPort &getDataPort() override
+    Port &
+    getDataPort() override
     {
         // the checker does not have ports on its own so return the
         // data port of the actual CPU core
@@ -113,7 +114,8 @@
         return *dcachePort;
     }
 
-    MasterPort &getInstPort() override
+    Port &
+    getInstPort() override
     {
         // the checker does not have ports on its own so return the
         // data port of the actual CPU core
diff --git a/src/cpu/kvm/base.hh b/src/cpu/kvm/base.hh
index a22637f..7bf518f 100644
--- a/src/cpu/kvm/base.hh
+++ b/src/cpu/kvm/base.hh
@@ -97,8 +97,8 @@
 
     void verifyMemoryMode() const override;
 
-    MasterPort &getDataPort() override { return dataPort; }
-    MasterPort &getInstPort() override { return instPort; }
+    Port &getDataPort() override { return dataPort; }
+    Port &getInstPort() override { return instPort; }
 
     void wakeup(ThreadID tid = 0) override;
     void activateContext(ThreadID thread_num) override;
diff --git a/src/cpu/minor/cpu.cc b/src/cpu/minor/cpu.cc
index 63efde2..ddba0cd 100644
--- a/src/cpu/minor/cpu.cc
+++ b/src/cpu/minor/cpu.cc
@@ -321,12 +321,14 @@
     return new MinorCPU(this);
 }
 
-MasterPort &MinorCPU::getInstPort()
+Port &
+MinorCPU::getInstPort()
 {
     return pipeline->getInstPort();
 }
 
-MasterPort &MinorCPU::getDataPort()
+Port &
+MinorCPU::getDataPort()
 {
     return pipeline->getDataPort();
 }
diff --git a/src/cpu/minor/cpu.hh b/src/cpu/minor/cpu.hh
index 4e47623..e85b67f 100644
--- a/src/cpu/minor/cpu.hh
+++ b/src/cpu/minor/cpu.hh
@@ -114,10 +114,10 @@
     Enums::ThreadPolicy threadPolicy;
   protected:
      /** Return a reference to the data port. */
-    MasterPort &getDataPort() override;
+    Port &getDataPort() override;
 
     /** Return a reference to the instruction port. */
-    MasterPort &getInstPort() override;
+    Port &getInstPort() override;
 
   public:
     MinorCPU(MinorCPUParams *params);
diff --git a/src/cpu/o3/cpu.hh b/src/cpu/o3/cpu.hh
index 58a2218..ac917db 100644
--- a/src/cpu/o3/cpu.hh
+++ b/src/cpu/o3/cpu.hh
@@ -735,14 +735,14 @@
     }
 
     /** Used by the fetch unit to get a hold of the instruction port. */
-    MasterPort &
+    Port &
     getInstPort() override
     {
         return this->fetch.getInstPort();
     }
 
     /** Get the dcache port (used to find block size for translations). */
-    MasterPort &
+    Port &
     getDataPort() override
     {
         return this->iew.ldstQueue.getDataPort();
diff --git a/src/cpu/simple/atomic.hh b/src/cpu/simple/atomic.hh
index ba52bc9..69ac09e 100644
--- a/src/cpu/simple/atomic.hh
+++ b/src/cpu/simple/atomic.hh
@@ -174,10 +174,10 @@
   protected:
 
     /** Return a reference to the data port. */
-    MasterPort &getDataPort() override { return dcachePort; }
+    Port &getDataPort() override { return dcachePort; }
 
     /** Return a reference to the instruction port. */
-    MasterPort &getInstPort() override { return icachePort; }
+    Port &getInstPort() override { return icachePort; }
 
     /** Perform snoop for other cpu-local thread contexts. */
     void threadSnoop(PacketPtr pkt, ThreadID sender);
diff --git a/src/cpu/simple/timing.hh b/src/cpu/simple/timing.hh
index e423ae8..53e0ed7 100644
--- a/src/cpu/simple/timing.hh
+++ b/src/cpu/simple/timing.hh
@@ -264,10 +264,10 @@
   protected:
 
      /** Return a reference to the data port. */
-    MasterPort &getDataPort() override { return dcachePort; }
+    Port &getDataPort() override { return dcachePort; }
 
     /** Return a reference to the instruction port. */
-    MasterPort &getInstPort() override { return icachePort; }
+    Port &getInstPort() override { return icachePort; }
 
   public:
 
diff --git a/src/cpu/trace/trace_cpu.hh b/src/cpu/trace/trace_cpu.hh
index c873a34..ebc14ca 100644
--- a/src/cpu/trace/trace_cpu.hh
+++ b/src/cpu/trace/trace_cpu.hh
@@ -1146,10 +1146,10 @@
   public:
 
     /** Used to get a reference to the icache port. */
-    MasterPort &getInstPort() { return icachePort; }
+    Port &getInstPort() { return icachePort; }
 
     /** Used to get a reference to the dcache port. */
-    MasterPort &getDataPort() { return dcachePort; }
+    Port &getDataPort() { return dcachePort; }
 
     void regStats();
 };