diff --git a/netcfg/netcfg.c b/netcfg/netcfg.c
index 4e83ba4..204bf1d 100644
--- a/netcfg/netcfg.c
+++ b/netcfg/netcfg.c
@@ -22,6 +22,7 @@
 #include <netutils/ifc.h>
 #include <stdio.h>
 #include <stdlib.h>
+#include <string.h>
 
 void die(const char *reason)
 {
diff --git a/toolbox/dynarray.c b/toolbox/dynarray.c
index e9b7b03..47594e0 100644
--- a/toolbox/dynarray.c
+++ b/toolbox/dynarray.c
@@ -1,6 +1,7 @@
 #include "dynarray.h"
-#include <stdlib.h>
 #include <limits.h>
+#include <stdlib.h>
+#include <string.h>
 
 void
 dynarray_init( dynarray_t *a )
diff --git a/toolbox/watchprops.c b/toolbox/watchprops.c
index 0d05aba..cd62922 100644
--- a/toolbox/watchprops.c
+++ b/toolbox/watchprops.c
@@ -1,5 +1,6 @@
 #include <stdio.h>
 #include <stdlib.h>
+#include <string.h>
 #include <time.h>
 #include <errno.h>