diff --git a/include/swupd.h b/include/swupd.h
index 7dd3b5e..a1fd405 100644
--- a/include/swupd.h
+++ b/include/swupd.h
@@ -20,12 +20,12 @@
 #define TAR_COMMAND "bsdtar"
 #define TAR_XATTR_ARGS ""
 #define TAR_XATTR_ARGS_STRLIST
-#define TAR_WARN_ARGS ""
+#define TAR_WARN_ARGS_STRLIST
 #else
 #define TAR_COMMAND "tar"
 #define TAR_XATTR_ARGS "--xattrs --xattrs-include='*'"
 #define TAR_XATTR_ARGS_STRLIST "--xattrs", "--xattrs-include='*'",
-#define TAR_WARN_ARGS "--warning=no-timestamp"
+#define TAR_WARN_ARGS_STRLIST "--warning=no-timestamp",
 #endif
 
 #if SWUPD_WITH_SELINUX
diff --git a/src/pack.c b/src/pack.c
index 726226a..45e31eb 100644
--- a/src/pack.c
+++ b/src/pack.c
@@ -116,7 +116,7 @@ static void explode_pack_stage(int from_version, int to_version, char *module)
 		 * time on the client...
 		 */
 		string_or_die(&param, "%s/%s/%i_to_%i/staged", packstage_dir, module, from_version, to_version);
-		char *const tarcmd[] = { TAR_COMMAND, "-C", param, TAR_WARN_ARGS, TAR_PERM_ATTR_ARGS_STRLIST, "-xf", path, NULL };
+		char *const tarcmd[] = { TAR_COMMAND, "-C", param, TAR_WARN_ARGS_STRLIST TAR_PERM_ATTR_ARGS_STRLIST, "-xf", path, NULL };
 		if (system_argv(tarcmd) == 0) {
 			unlink(path);
 		}