diff --git a/src/engine/platform/tia.cpp b/src/engine/platform/tia.cpp
index 59c534913..796c94481 100644
--- a/src/engine/platform/tia.cpp
+++ b/src/engine/platform/tia.cpp
@@ -324,6 +324,10 @@ void DivPlatformTIA::reset() {
   }
 }
 
+float DivPlatformTIA::getPostAmp() {
+  return 0.5f;
+}
+
 bool DivPlatformTIA::isStereo() {
   return (mixingType==2);
 }
diff --git a/src/engine/platform/tia.h b/src/engine/platform/tia.h
index c6ea280d7..b838e0682 100644
--- a/src/engine/platform/tia.h
+++ b/src/engine/platform/tia.h
@@ -63,6 +63,7 @@ class DivPlatformTIA: public DivDispatch {
     void tick(bool sysTick=true);
     void muteChannel(int ch, bool mute);
     void setFlags(unsigned int flags);
+    float getPostAmp();
     bool isStereo();
     bool keyOffAffectsArp(int ch);
     void notifyInsDeletion(void* ins);