diff --git a/include/mediastreamer2/msfilerec.h b/include/mediastreamer2/msfilerec.h
index 70e0a64e6..7fe417cc1 100644
--- a/include/mediastreamer2/msfilerec.h
+++ b/include/mediastreamer2/msfilerec.h
@@ -27,6 +27,7 @@ extern MSFilterDesc ms_file_rec_desc;
 #define MS_FILE_REC_START	MS_FILTER_METHOD_NO_ARG(MS_FILE_REC_ID,1)
 #define MS_FILE_REC_STOP	MS_FILTER_METHOD_NO_ARG(MS_FILE_REC_ID,2)
 #define MS_FILE_REC_CLOSE	MS_FILTER_METHOD_NO_ARG(MS_FILE_REC_ID,3)
+#define MS_FILE_REC_FORCE_WAV	MS_FILTER_METHOD_NO_ARG(MS_FILE_REC_ID,4)
 
 
 
diff --git a/src/audiofilters/msfilerec.c b/src/audiofilters/msfilerec.c
index 7a008e8bc..a84cacb57 100644
--- a/src/audiofilters/msfilerec.c
+++ b/src/audiofilters/msfilerec.c
@@ -290,6 +290,12 @@ static int rec_set_max_size(MSFilter *f, void *arg) {
 	return 0;
 }
 
+static int rec_force_wav(MSFilter *f, void *arg) {
+        RecState *d=(RecState*)f->data;
+        d->is_wav = TRUE;
+        return 0;
+}
+
 static MSFilterMethod rec_methods[]={
 	{	MS_FILTER_SET_SAMPLE_RATE,	rec_set_sr	},
 	{	MS_FILTER_SET_NCHANNELS	,	rec_set_nchannels	},
@@ -307,6 +313,7 @@ static MSFilterMethod rec_methods[]={
 	{ 	MS_FILTER_GET_OUTPUT_FMT, 	rec_get_fmtp },
 	{ 	MS_FILTER_SET_OUTPUT_FMT, 	rec_set_fmtp },
 	{	MS_RECORDER_SET_MAX_SIZE,	rec_set_max_size },
+	{	MS_FILE_REC_FORCE_WAV   ,       rec_force_wav	},
 	{	0			,	NULL		}
 };