diff --git a/core/plug-in/speex/speex.c b/core/plug-in/speex/speex.c
index 80e64b0b..f43a127c 100644
--- a/core/plug-in/speex/speex.c
+++ b/core/plug-in/speex/speex.c
@@ -282,7 +282,7 @@ int Pcm16_2_SpeexNB( unsigned char* out_buf, unsigned char* in_buf, unsigned int
 {
   SpeexState* ss;
   OneWay *encoder;
-  const short* pcm = (const short*) in_buf;
+  short* pcm = (short*) in_buf;
   char* buffer = (char*)out_buf;
   div_t blocks;