diff --git a/Source/Core/Core/PowerPC/Expression.cpp b/Source/Core/Core/PowerPC/Expression.cpp
index d522b7d522..bd97e8a8b1 100644
--- a/Source/Core/Core/PowerPC/Expression.cpp
+++ b/Source/Core/Core/PowerPC/Expression.cpp
@@ -447,9 +447,15 @@ void Expression::SynchronizeBindings(Core::System& system, SynchronizeDirection
       break;
     case VarBindingType::SPR:
       if (dir == SynchronizeDirection::From)
+      {
         v->value = static_cast<double>(ppc_state.spr[bind->index]);
+      }
       else
+      {
         ppc_state.spr[bind->index] = static_cast<u32>(static_cast<s64>(v->value));
+        if (bind->index == SPR_SDR)
+          system.GetMMU().SDRUpdated();
+      }
       break;
     case VarBindingType::PCtr:
       if (dir == SynchronizeDirection::From)
@@ -457,9 +463,14 @@ void Expression::SynchronizeBindings(Core::System& system, SynchronizeDirection
       break;
     case VarBindingType::MSR:
       if (dir == SynchronizeDirection::From)
+      {
         v->value = static_cast<double>(ppc_state.msr.Hex);
+      }
       else
+      {
         ppc_state.msr.Hex = static_cast<u32>(static_cast<s64>(v->value));
+        PowerPC::MSRUpdated(ppc_state);
+      }
       break;
     }
   }
diff --git a/Source/Core/Core/PowerPC/GDBStub.cpp b/Source/Core/Core/PowerPC/GDBStub.cpp
index a339ad251a..5074629faa 100644
--- a/Source/Core/Core/PowerPC/GDBStub.cpp
+++ b/Source/Core/Core/PowerPC/GDBStub.cpp
@@ -684,6 +684,7 @@ static void WriteRegister()
       break;
     case 104:
       ppc_state.spr[SPR_SDR] = re32hex(bufptr);
+      system.GetMMU().SDRUpdated();
       break;
     case 105:
       ppc_state.spr[SPR_ASR] = re64hex(bufptr);