2 files changed, 3 insertions, 1 deletions
diff --git a/gzio.c b/gzio.c
index 2485201a..bbdc1d45 100644
--- a/gzio.c
+++ b/gzio.c
@@ -61,6 +61,8 @@ struct gzio_handle {
   unsigned is_output : 8;
 };
 
+val gzio_stream_s;
+
 struct cobj_class *gzio_stream_cls;
 
 static void gzio_stream_print(val stream, val out, val pretty,
diff --git a/gzio.h b/gzio.h
index 2f9cf164..4b5e9ee9 100644
--- a/gzio.h
+++ b/gzio.h
@@ -26,7 +26,7 @@
  * POSSIBILITY OF SUCH DAMAGE.
  */
 
-val gzio_stream_s;
+extern val gzio_stream_s;
 void gzio_init(void);
 gzFile w_gzopen_mode(const wchar_t *wname, const wchar_t *wmode,
                      const struct stdio_mode m, val self);