diff --git a/src/engine/platform/fmshared_OPN.h b/src/engine/platform/fmshared_OPN.h
index d2191301..b1bd96db 100644
--- a/src/engine/platform/fmshared_OPN.h
+++ b/src/engine/platform/fmshared_OPN.h
@@ -156,6 +156,7 @@ class DivPlatformOPN: public DivPlatformFMBase {
 
     DivConfig ayFlags;
 
+    friend void putDispatchChip(void*,int);
     DivPlatformOPN(double f=9440540.0, unsigned int d=72, unsigned int a=32, bool isExtSys=false):
       DivPlatformFMBase(),
       fmFreqBase(f),
diff --git a/src/engine/platform/genesis.h b/src/engine/platform/genesis.h
index 53a6eada..e126db58 100644
--- a/src/engine/platform/genesis.h
+++ b/src/engine/platform/genesis.h
@@ -90,6 +90,7 @@ class DivPlatformGenesis: public DivPlatformOPN {
     void acquire_nuked(short* bufL, short* bufR, size_t start, size_t len);
     void acquire_ymfm(short* bufL, short* bufR, size_t start, size_t len);
   
+    friend void putDispatchChip(void*,int);
   public:
     void acquire(short* bufL, short* bufR, size_t start, size_t len);
     void fillStream(std::vector<DivDelayedWrite>& stream, int sRate, size_t len);