diff --git a/src/tools/fs_shell/string.cpp b/src/tools/fs_shell/string.cpp
index fcce045f46..e6094a4ddd 100644
--- a/src/tools/fs_shell/string.cpp
+++ b/src/tools/fs_shell/string.cpp
@@ -8,6 +8,7 @@
 #include "fssh_string.h"
 
 #include <string.h>
+#include <strings.h>
 
 
 void*