1 files changed, 1 insertions, 1 deletions

diff --git a/gzclose.c b/gzclose.c
index 2cf2843..e20d404 100644
--- a/gzclose.c
+++ b/gzclose.c
@@ -17,7 +17,7 @@ int ZEXPORT gzclose(file)
     gz_statep state;
 
     if (file == NULL)
-        return EOF;
+        return Z_STREAM_ERROR;
     state = (gz_statep)file;
 
     return state->mode == GZ_READ ? gzclose_r(file) : gzclose_w(file);