diff --git a/usr/src/cmd/svc/svcs/svcs.c b/usr/src/cmd/svc/svcs/svcs.c
index 049dec9..c54f4bd 100644
--- a/usr/src/cmd/svc/svcs/svcs.c
+++ b/usr/src/cmd/svc/svcs/svcs.c
@@ -1002,13 +1002,14 @@ reverse_bytes(char *buf, size_t len)
 
 /* CTID */
 #define        CTID_COLUMN_WIDTH               6
+#define        CTID_COLUMN_BUFSIZE             20      /* max ctid_t + space + \0 */
 
 static void
 sprint_ctid(char **buf, scf_walkinfo_t *wip)
 {
        int r;
        uint64_t c;
-       size_t newsize = (*buf ? strlen(*buf) : 0) + CTID_COLUMN_WIDTH + 2;
+       size_t newsize = (*buf ? strlen(*buf) : 0) + CTID_COLUMN_BUFSIZE;
        char *newbuf = safe_malloc(newsize);
        int restarter_spec;