diff --git a/cfg-common.h b/cfg-common.h
index 58bfc5a26d..7a75a8532f 100644
--- a/cfg-common.h
+++ b/cfg-common.h
@@ -356,6 +356,7 @@ extern int field_dominance;
 
 /* from dec_audio, currently used for ac3surround decoder only */
 extern int audio_output_channels;
+extern int fakemono;
 
 /* defined in network.c */
 extern char *network_username;
diff --git a/cfg-mencoder.h b/cfg-mencoder.h
index 94a6306bfc..aaf51cb0be 100644
--- a/cfg-mencoder.h
+++ b/cfg-mencoder.h
@@ -5,8 +5,6 @@
 
 #include "cfg-common.h"
 
-extern int fakemono; // defined in dec_audio.c
-
 extern int sws_flags;
 extern int readPPOpt(void *, char *arg);
 extern void revertPPOpt(void *conf, char* opt);
diff --git a/cfg-mplayer.h b/cfg-mplayer.h
index db538e700d..8b1e7d1a5a 100644
--- a/cfg-mplayer.h
+++ b/cfg-mplayer.h
@@ -10,7 +10,6 @@ extern unsigned doubleclick_time;
 extern char *fb_mode_cfgfile;
 extern char *fb_mode_name;
 extern char *dfb_params;
-extern int fakemono; // defined in dec_audio.c
 
 extern char *lirc_configfile;