diff --git a/src/ca/vms_depen.c b/src/ca/vms_depen.c
index a6d48e1a5..54afef43d 100644
--- a/src/ca/vms_depen.c
+++ b/src/ca/vms_depen.c
@@ -286,7 +286,8 @@ void ca_spawn_repeater()
  * gethostbyaddr(). This makes gethostbyaddr()
  * hang when it is called from AST level. 
  */
-void caHostFromInetAddr(struct in_addr *pnet_addr, char *pBuf, unsigned size)
+void caHostFromInetAddr(const struct in_addr *pnet_addr, 
+		char *pBuf, unsigned size)
 {
         char            *pString;
 
diff --git a/src/ca/vxWorks_depen.c b/src/ca/vxWorks_depen.c
index 409b57893..7ea3527f4 100644
--- a/src/ca/vxWorks_depen.c
+++ b/src/ca/vxWorks_depen.c
@@ -601,7 +601,10 @@ char *localUserName()
 /*
  * caHostFromInetAddr()
  */
-void caHostFromInetAddr(struct in_addr *pnet_addr, char *pBuf, unsigned size)
+void caHostFromInetAddr(
+const struct in_addr 	*pnet_addr, 
+char 			*pBuf, 
+unsigned 		size)
 {
         char    str[INET_ADDR_LEN];