diff --git a/lib/api.c b/lib/api.c
index ae2c6bd0f..9455b0a3f 100644
--- a/lib/api.c
+++ b/lib/api.c
@@ -5,6 +5,7 @@
  *********************************************************************************/
 
 #include <libwebsockets.h>
+#include <string.h>
 
 #include "api.h"
 #include "log.h"
diff --git a/lib/web.c b/lib/web.c
index d7b0db2b7..1bb3edbd6 100644
--- a/lib/web.c
+++ b/lib/web.c
@@ -8,6 +8,7 @@
 #include <libwebsockets.h>
 
 #include <linux/limits.h>
+#include <string.h>
 
 #include "utils.h"
 #include "log.h"
diff --git a/lib/web/buffer.c b/lib/web/buffer.c
index bea3906dc..d40d00d44 100644
--- a/lib/web/buffer.c
+++ b/lib/web/buffer.c
@@ -5,6 +5,7 @@
  *********************************************************************************/
 
 #include <jansson.h>
+#include <string.h>
 
 #include "compat.h"
 #include "assert.h"