- include strings.h
  Thanks to Rich Felker for pointing this out.
diff --git a/libbb/u_signal_names.c b/libbb/u_signal_names.c
index 31ebd89..bf65fa3 100644
--- a/libbb/u_signal_names.c
+++ b/libbb/u_signal_names.c
@@ -11,6 +11,7 @@
 #include <signal.h>
 #include <ctype.h>
 #include <string.h>
+#include <strings.h>
 #include <stdlib.h>
 #include <stdio.h>