diff --git a/src/bpt/cvtBpt.c b/src/bpt/cvtBpt.c
index 43b017a30..a05cb647a 100644
--- a/src/bpt/cvtBpt.c
+++ b/src/bpt/cvtBpt.c
@@ -35,6 +35,7 @@
 #include     <vxWorks.h>
 #include     <stdlib.h>
 #include     <stdio.h>
+#include     <string.h>
 #include     <ctype.h>
 
 #include     <ellLib.h>