diff --git a/sockets.c b/sockets.c
index 9b594d2..98b9525 100644
--- a/sockets.c
+++ b/sockets.c
@@ -18,6 +18,7 @@
 
 #include <errno.h>
 #include <stdlib.h>
+#include <string.h>
 
 #include "sockets.h"
 #include "util.h"
diff --git a/sport.c b/sport.c
index 9fb0a51..30d919d 100644
--- a/sport.c
+++ b/sport.c
@@ -19,6 +19,7 @@
 #include <fcntl.h>
 #include <unistd.h>
 #include <errno.h>
+#include <string.h>
 
 #include "sport.h"
 #include "util.h"