diff --git a/src/android/i_sound.c b/src/android/i_sound.c
index ecf96f2f0..77f8e6a55 100644
--- a/src/android/i_sound.c
+++ b/src/android/i_sound.c
@@ -21,13 +21,14 @@ void I_ShutdownSound(void){}
 //  SFX I/O
 //
 
-INT32 I_StartSound(sfxenum_t id, INT32 vol, INT32 sep, INT32 pitch, INT32 priority)
+INT32 I_StartSound(sfxenum_t id, INT32 vol, INT32 sep, INT32 pitch, INT32 priority, INT32 channel)
 {
         (void)id;
         (void)vol;
         (void)sep;
         (void)pitch;
         (void)priority;
+        (void)channel;
         return -1;
 }
 
diff --git a/src/djgppdos/i_sound.c b/src/djgppdos/i_sound.c
index f1e2ad2bf..ec6f4412f 100644
--- a/src/djgppdos/i_sound.c
+++ b/src/djgppdos/i_sound.c
@@ -165,7 +165,7 @@ INT32 I_StartSound ( sfxenum_t     id,
                    INT32         vol,
                    INT32         sep,
                    INT32         pitch,
-                   INT32         priority
+                   INT32         priority,
 				   INT32         channel)
 {
 	int voice;
diff --git a/src/win32ce/win_snd.c b/src/win32ce/win_snd.c
index a58bbc3ce..14ce4add4 100644
--- a/src/win32ce/win_snd.c
+++ b/src/win32ce/win_snd.c
@@ -538,7 +538,7 @@ INT32 I_StartSound (sfxenum_t      id,
                   INT32          vol,
                   INT32          sep,
                   INT32          pitch,
-                  INT32          priority
+                  INT32          priority,
 				  INT32          channel)
 {
 	HRESULT     hr;