diff --git a/search.c b/search.c
index eabeb985..b10e75ac 100644
--- a/search.c
+++ b/search.c
@@ -1,5 +1,6 @@
 #include "search.h"
 
+#include <string.h>
 #include <wchar.h>
 #include <wctype.h>
 
diff --git a/server.c b/server.c
index bb38a6dd..6aceda46 100644
--- a/server.c
+++ b/server.c
@@ -1,5 +1,6 @@
 #include "server.h"
 
+#include <string.h>
 #include <unistd.h>
 #include <errno.h>
 
diff --git a/wayland.c b/wayland.c
index 938056ac..32d7caf6 100644
--- a/wayland.c
+++ b/wayland.c
@@ -1,6 +1,7 @@
 #include "wayland.h"
 
 #include <stdlib.h>
+#include <string.h>
 #include <unistd.h>
 #include <errno.h>