diff --git a/audio/audio.h b/audio/audio.h
index ae29b8a63c3f395809f978e4bf29ed98f8f74d2b..4b0e7a3a88fdae6e3b0e2d5e38b3f141807d677b 100644
--- a/audio/audio.h
+++ b/audio/audio.h
@@ -170,4 +170,7 @@ uint32_t lsbindex (uint32_t u);
 #define audio_MAX(a, b) ((a)<(b)?(b):(a))
 #endif
 
+int wav_start_capture (CaptureState *s, const char *path, int freq,
+                       int bits, int nchannels);
+
 #endif  /* audio.h */
diff --git a/monitor.c b/monitor.c
index 038b2f9e4f426e2adab5c4a60bd1dcdd2cfeaaad..4f51eccdcade54c824a0b2e9c2ec24b398f66b75 100644
--- a/monitor.c
+++ b/monitor.c
@@ -1337,9 +1337,6 @@ static void do_stop_capture (int n)
 }
 
 #ifdef HAS_AUDIO
-int wav_start_capture (CaptureState *s, const char *path, int freq,
-                       int bits, int nchannels);
-
 static void do_wav_capture (const char *path,
                             int has_freq, int freq,
                             int has_bits, int bits,