diff -purN AppStream-0.12.2.orig/src/as-tag.c AppStream-0.12.2/src/as-tag.c
--- AppStream-0.12.2.orig/src/as-tag.c	2018-08-04 09:39:44.000000000 +0200
+++ AppStream-0.12.2/src/as-tag.c	2018-11-09 08:33:05.745280072 +0100
@@ -36,6 +36,8 @@
 #pragma clang diagnostic ignored "-Wmissing-field-initializers"
 #endif
 
+#include <string.h>
+
 #pragma GCC visibility push(hidden)
 #pragma GCC diagnostic push
 #pragma GCC diagnostic ignored "-Wconversion"