diff --git a/dlls/gphoto2.ds/gphoto2_i.h b/dlls/gphoto2.ds/gphoto2_i.h
index 9ab8bbbf33b..4171fcae4f4 100644
--- a/dlls/gphoto2.ds/gphoto2_i.h
+++ b/dlls/gphoto2.ds/gphoto2_i.h
@@ -100,7 +100,9 @@ struct tagActiveDS
     struct jpeg_decompress_struct	jd;
     struct jpeg_error_mgr		jerr;
 #endif
-} activeDS DECLSPEC_HIDDEN;
+};
+
+extern struct tagActiveDS activeDS DECLSPEC_HIDDEN;
 
 /* Helper functions */
 extern TW_UINT16 GPHOTO2_SaneCapability (pTW_CAPABILITY pCapability, TW_UINT16 action) DECLSPEC_HIDDEN;
diff --git a/dlls/gphoto2.ds/gphoto2_main.c b/dlls/gphoto2.ds/gphoto2_main.c
index 28100414cc7..4d71c89e2e2 100644
--- a/dlls/gphoto2.ds/gphoto2_main.c
+++ b/dlls/gphoto2.ds/gphoto2_main.c
@@ -33,6 +33,8 @@
 
 WINE_DEFAULT_DEBUG_CHANNEL(twain);
 
+struct tagActiveDS activeDS;
+
 DSMENTRYPROC GPHOTO2_dsmentry;
 
 #ifdef HAVE_GPHOTO2