diff --git a/apps/openmw/mwscript/dialogueextensions.cpp b/apps/openmw/mwscript/dialogueextensions.cpp
index c2ff9ed8bd..26fb6d9bed 100644
--- a/apps/openmw/mwscript/dialogueextensions.cpp
+++ b/apps/openmw/mwscript/dialogueextensions.cpp
@@ -8,6 +8,7 @@
 #include <components/interpreter/opcodes.hpp>
 
 #include "../mwdialogue/journal.hpp"
+#include "../mwdialogue/dialoguemanager.hpp"
 
 #include "interpretercontext.hpp"
 
@@ -72,15 +73,33 @@ namespace MWScript
                 }
         };
 
+        class OpAddTopic : public Interpreter::Opcode0
+        {
+            public:
+
+                virtual void execute (Interpreter::Runtime& runtime)
+                {
+                    MWScript::InterpreterContext& context
+                        = static_cast<MWScript::InterpreterContext&> (runtime.getContext());
+
+                    std::string topic = runtime.getStringLiteral (runtime[0].mInteger);
+                    runtime.pop();
+
+                    context.getEnvironment().mDialogueManager->addTopic(topic);
+                }
+        };
+
         const int opcodeJournal = 0x2000133;
         const int opcodeSetJournalIndex = 0x2000134;
         const int opcodeGetJournalIndex = 0x2000135;
+        const int opcodeAddTopic = 0x200013a;
 
         void registerExtensions (Compiler::Extensions& extensions)
         {
             extensions.registerInstruction ("journal", "cl", opcodeJournal);
             extensions.registerInstruction ("setjournalindex", "cl", opcodeSetJournalIndex);
             extensions.registerFunction ("getjournalindex", 'l', "c", opcodeGetJournalIndex);
+            extensions.registerInstruction ("addtopic", "S" , opcodeAddTopic);            
         }
 
         void installOpcodes (Interpreter::Interpreter& interpreter)
@@ -88,6 +107,7 @@ namespace MWScript
             interpreter.installSegment5 (opcodeJournal, new OpJournal);
             interpreter.installSegment5 (opcodeSetJournalIndex, new OpSetJournalIndex);
             interpreter.installSegment5 (opcodeGetJournalIndex, new OpGetJournalIndex);
+            interpreter.installSegment5 (opcodeAddTopic, new OpAddTopic);            
         }
     }
 
diff --git a/apps/openmw/mwscript/docs/vmformat.txt b/apps/openmw/mwscript/docs/vmformat.txt
index 1836053286..1f033c8db8 100644
--- a/apps/openmw/mwscript/docs/vmformat.txt
+++ b/apps/openmw/mwscript/docs/vmformat.txt
@@ -115,4 +115,5 @@ op 0x2000136: GetPCCell
 op 0x2000137: GetButtonPressed
 op 0x2000138: SkipAnim
 op 0x2000139: SkipAnim, expplicit reference
-opcodes 0x200013a-0x3ffffff unused
+op 0x200013a: AddTopic
+opcodes 0x200013b-0x3ffffff unused