diff --git a/cli/wave64.c b/cli/wave64.c

index 7beffe6..59548b1 100644

--- a/cli/wave64.c

+++ b/cli/wave64.c

@@ -56,6 +56,7 @@ int ParseWave64HeaderConfig (FILE *infile, char *infilename, char *fourcc, Wavpa

     int format_chunk = 0;

     uint32_t bcount;

+    CLEAR (WaveHeader);

     infilesize = DoGetFileSize (infile);

     memcpy (&filehdr, fourcc, 4);