diff --git a/sys/osxaudio/gstosxcoreaudio.c b/sys/osxaudio/gstosxcoreaudio.c
index 8809cc4050b3f1bda3bfc4d59cce3c233a7a5117..19d349b6abe2f152c32958c53cc039f93470ef7f 100644
--- a/sys/osxaudio/gstosxcoreaudio.c
+++ b/sys/osxaudio/gstosxcoreaudio.c
@@ -504,7 +504,7 @@ gst_core_audio_asbd_to_caps (AudioStreamBasicDescription * asbd,
   bps = asbd->mBitsPerChannel;
   endianness = asbd->mFormatFlags & kAudioFormatFlagIsBigEndian ?
       G_BIG_ENDIAN : G_LITTLE_ENDIAN;
-  sign = asbd->mFormatID & kAudioFormatFlagIsSignedInteger ? TRUE : FALSE;
+  sign = asbd->mFormatFlags & kAudioFormatFlagIsSignedInteger ? TRUE : FALSE;
   interleaved = asbd->mFormatFlags & kAudioFormatFlagIsNonInterleaved ?
       TRUE : FALSE;