diff --git a/src/donations.c b/src/donations.c
index c9b4a6c6a..09d572177 100644
--- a/src/donations.c
+++ b/src/donations.c
@@ -7,6 +7,7 @@
 #include <quicklist.h>
 
 #include <stdlib.h>
+#include <string.h>
 
 typedef struct transfer {
     struct region *r;