diff --git a/zlibWrapper/gzguts.h b/zlibWrapper/gzguts.h
index 3d8d7e76a..5ec33a5b8 100644
--- a/zlibWrapper/gzguts.h
+++ b/zlibWrapper/gzguts.h
@@ -196,7 +196,6 @@ typedef struct {
     z_stream strm;          /* stream structure in-place (not a pointer) */
 } gz_state;
 
-typedef struct gzFile_s *gzFile;    /* semi-opaque gzip file descriptor */ 
 typedef union {
     gz_state* state;
     gzFile file;