diff --git a/src/engine/platform/arcade.h b/src/engine/platform/arcade.h
index 77924ab6..f8c66aca 100644
--- a/src/engine/platform/arcade.h
+++ b/src/engine/platform/arcade.h
@@ -61,6 +61,8 @@ class DivPlatformArcade: public DivPlatformOPM {
     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 putDispatchChan(void*,int,int);
+    friend void putDispatchChip(void*,int);
   public:
     void acquire(short* bufL, short* bufR, size_t start, size_t len);
     int dispatch(DivCommand c);
diff --git a/src/engine/platform/fmsharedbase.h b/src/engine/platform/fmsharedbase.h
index 76413952..e5cf4c35 100644
--- a/src/engine/platform/fmsharedbase.h
+++ b/src/engine/platform/fmsharedbase.h
@@ -123,7 +123,6 @@ class DivPlatformFMBase: public DivDispatch {
       }
     }
 
-    friend void putDispatchChip(void*,int);
     friend void putDispatchChan(void*,int,int);
   
     DivPlatformFMBase():
diff --git a/src/engine/platform/tx81z.h b/src/engine/platform/tx81z.h
index 943cc023..07338725 100644
--- a/src/engine/platform/tx81z.h
+++ b/src/engine/platform/tx81z.h
@@ -57,6 +57,7 @@ class DivPlatformTX81Z: public DivPlatformOPM {
     int octave(int freq);
     int toFreq(int freq);
 
+    friend void putDispatchChip(void*,int);
   public:
     void acquire(short* bufL, short* bufR, size_t start, size_t len);
     int dispatch(DivCommand c);
diff --git a/src/engine/platform/ym2203.h b/src/engine/platform/ym2203.h
index 4125e3a4..3bb3d8e6 100644
--- a/src/engine/platform/ym2203.h
+++ b/src/engine/platform/ym2203.h
@@ -51,6 +51,7 @@ class DivPlatformYM2203: public DivPlatformOPN {
     bool extMode, noExtMacros;
     unsigned char prescale;
 
+    friend void putDispatchChip(void*,int);
   public:
     void acquire(short* bufL, short* bufR, size_t start, size_t len);
     int dispatch(DivCommand c);
diff --git a/src/engine/platform/ym2203ext.h b/src/engine/platform/ym2203ext.h
index 63ba2c35..37aba220 100644
--- a/src/engine/platform/ym2203ext.h
+++ b/src/engine/platform/ym2203ext.h
@@ -24,6 +24,7 @@
 class DivPlatformYM2203Ext: public DivPlatformYM2203 {
   OPNOpChannel opChan[4];
   bool isOpMuted[4];
+  friend void putDispatchChip(void*,int);
   public:
     int dispatch(DivCommand c);
     void* getChanState(int chan);
diff --git a/src/engine/platform/ym2608.h b/src/engine/platform/ym2608.h
index 6e285c01..29215820 100644
--- a/src/engine/platform/ym2608.h
+++ b/src/engine/platform/ym2608.h
@@ -66,6 +66,7 @@ class DivPlatformYM2608: public DivPlatformOPN {
     double NOTE_OPNB(int ch, int note);
     double NOTE_ADPCMB(int note);
 
+    friend void putDispatchChip(void*,int);
   public:
     void acquire(short* bufL, short* bufR, size_t start, size_t len);
     int dispatch(DivCommand c);
diff --git a/src/engine/platform/ym2608ext.h b/src/engine/platform/ym2608ext.h
index 58840528..30d9644d 100644
--- a/src/engine/platform/ym2608ext.h
+++ b/src/engine/platform/ym2608ext.h
@@ -24,6 +24,7 @@
 class DivPlatformYM2608Ext: public DivPlatformYM2608 {
   OPNOpChannelStereo opChan[4];
   bool isOpMuted[4];
+  friend void putDispatchChip(void*,int);
   public:
     int dispatch(DivCommand c);
     void* getChanState(int chan);
diff --git a/src/engine/platform/ym2610.h b/src/engine/platform/ym2610.h
index 1b6edb9f..6139f6d5 100644
--- a/src/engine/platform/ym2610.h
+++ b/src/engine/platform/ym2610.h
@@ -35,6 +35,7 @@ class DivPlatformYM2610: public DivPlatformYM2610Base<14> {
       1, 2, 4, 5
     };
 
+    friend void putDispatchChip(void*,int);
   public:
     void acquire(short* bufL, short* bufR, size_t start, size_t len);
     int dispatch(DivCommand c);
diff --git a/src/engine/platform/ym2610b.h b/src/engine/platform/ym2610b.h
index 2db90d9a..2981b1ca 100644
--- a/src/engine/platform/ym2610b.h
+++ b/src/engine/platform/ym2610b.h
@@ -31,6 +31,7 @@ class DivPlatformYM2610B: public DivPlatformYM2610Base<16> {
       0, 1, 2, 4, 5, 6
     };
 
+    friend void putDispatchChip(void*,int);
   public:
     void acquire(short* bufL, short* bufR, size_t start, size_t len);
     int dispatch(DivCommand c);
diff --git a/src/engine/platform/ym2610bext.h b/src/engine/platform/ym2610bext.h
index 6c1f31a3..609bf5e9 100644
--- a/src/engine/platform/ym2610bext.h
+++ b/src/engine/platform/ym2610bext.h
@@ -24,6 +24,7 @@
 class DivPlatformYM2610BExt: public DivPlatformYM2610B {
   OPNOpChannelStereo opChan[4];
   bool isOpMuted[4];
+  friend void putDispatchChip(void*,int);
   public:
     int dispatch(DivCommand c);
     void* getChanState(int chan);
diff --git a/src/engine/platform/ym2610ext.h b/src/engine/platform/ym2610ext.h
index a1810746..676f355f 100644
--- a/src/engine/platform/ym2610ext.h
+++ b/src/engine/platform/ym2610ext.h
@@ -24,6 +24,7 @@
 class DivPlatformYM2610Ext: public DivPlatformYM2610 {
   OPNOpChannelStereo opChan[4];
   bool isOpMuted[4];
+  friend void putDispatchChip(void*,int);
   public:
     int dispatch(DivCommand c);
     void* getChanState(int chan);
diff --git a/src/gui/debug.cpp b/src/gui/debug.cpp
index 4d201d54..80d5e2cc 100644
--- a/src/gui/debug.cpp
+++ b/src/gui/debug.cpp
@@ -19,6 +19,7 @@
 
 #include "debug.h"
 #include "imgui.h"
+#include "../engine/platform/fmsharedbase.h"
 #include "../engine/platform/genesis.h"
 #include "../engine/platform/genesisext.h"
 #include "../engine/platform/sms.h"