diff --git a/quantum/xap/xap_handlers.c b/quantum/xap/xap_handlers.c
index 565dddc4cd..6937e83b52 100644
--- a/quantum/xap/xap_handlers.c
+++ b/quantum/xap/xap_handlers.c
@@ -14,6 +14,7 @@
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
 
+#include <string.h>
 #include <quantum.h>
 #include <xap.h>