diff --git a/src/ptserver/ptprocs.c b/src/ptserver/ptprocs.c
index 471b56ed92..ee56bcf3a6 100644
--- a/src/ptserver/ptprocs.c
+++ b/src/ptserver/ptprocs.c
@@ -1244,6 +1244,7 @@ getCPS2(struct rx_call *call, afs_int32 aid, afs_uint32 ahost, prlist *alist,
     afs_int32 hostid;
     int host_list = 0;
     struct in_addr iaddr;
+    char hoststr[16];
 
     *over = 0;
     iaddr.s_addr = ntohl(ahost);
@@ -1276,7 +1277,7 @@ getCPS2(struct rx_call *call, afs_int32 aid, afs_uint32 ahost, prlist *alist,
 	    || !AccessOK(tt, *cid, &tentry, PRP_MEMBER_MEM, PRP_MEMBER_ANY))
 	    ABORT_WITH(tt, PRPERM);
     }
-    code = NameToID(tt, inet_ntoa(iaddr), &hostid);
+    code = NameToID(tt, afs_inet_ntoa_r(iaddr.s_addr, hoststr), &hostid);
     if (code == PRSUCCESS && hostid != 0) {
 	temp = FindByID(tt, hostid);
 	if (temp) {
@@ -1323,6 +1324,7 @@ getHostCPS(struct rx_call *call, afs_uint32 ahost, prlist *alist,
     struct prentry host_tentry;
     afs_int32 hostid;
     struct in_addr iaddr;
+    char hoststr[16];
 
     *over = 0;
     iaddr.s_addr = ntohl(ahost);
@@ -1341,7 +1343,7 @@ getHostCPS(struct rx_call *call, afs_uint32 ahost, prlist *alist,
     if (code)
 	ABORT_WITH(tt, code);
 
-    code = NameToID(tt, inet_ntoa(iaddr), &hostid);
+    code = NameToID(tt, afs_inet_ntoa_r(iaddr.s_addr, hoststr), &hostid);
     if (code == PRSUCCESS && hostid != 0) {
 	temp = FindByID(tt, hostid);
 	if (temp) {
@@ -2117,11 +2119,12 @@ addWildCards(struct ubik_trans *tt, prlist *alist, afs_uint32 host)
     afs_int32 hostid;
     int size = 0, i, code;
     int added = 0;
+    char hoststr[16];
 
     while ((host = (host & wild))) {
 	wild = htonl(ntohl(wild) << 8);
 	iaddr.s_addr = host;
-	code = NameToID(tt, inet_ntoa(iaddr), &hostid);
+	code = NameToID(tt, afs_inet_ntoa_r(iaddr.s_addr, hoststr), &hostid);
 	if (code == PRSUCCESS && hostid != 0) {
 	    temp = FindByID(tt, hostid);
 	    if (temp) {