diff --git a/quantum/dynamic_keymap.c b/quantum/dynamic_keymap.c
index 5a183339c1..49971ba529 100644
--- a/quantum/dynamic_keymap.c
+++ b/quantum/dynamic_keymap.c
@@ -20,6 +20,7 @@
 #include "quantum.h" // for send_string()
 #include "dynamic_keymap.h"
 #include "via.h" // for default VIA_EEPROM_ADDR_END
+#include <string.h>
 
 #ifdef VIAL_ENABLE
 #include "vial.h"