diff --git a/scp.c b/scp.c
index e72ce8dd..7a509aa1 100644
--- a/scp.c
+++ b/scp.c
@@ -2929,23 +2929,19 @@ free (*tmpname);
 static t_stat sim_snprint_sym (char *buf, size_t bufsize, t_bool vm_flag, t_addr addr, t_value *val, UNIT *uptr, int32 sw, int32 dfltinc, int32 rdx, uint32 width, uint32 fmt)
 {
 t_stat reason;
-size_t str_width;
-size_t s;
+MEMFILE mbuf;
 
-rewind (sim_tmpfile);
+memset (&mbuf, 0, sizeof (mbuf));
+mbuf.buf = malloc (512);            /* Pre allocate a memory buffer to avoid */
+mbuf.size = 512;                    /* potential double vsnprintf to expand the buffer */
+sim_mfile = &mbuf;
 if (vm_flag || ((reason = fprint_sym (sim_tmpfile, addr, val, uptr, sw)) > 0)) {
     fprint_val (sim_tmpfile, val[0], rdx, width, fmt);
     reason = dfltinc;
     }
-str_width = (size_t)ftell(sim_tmpfile);
-if (str_width > width)
-    str_width = width;
-if (bufsize > str_width)
-    memset (buf + str_width, 0, bufsize - width);
-rewind (sim_tmpfile);
-s = fread (buf, 1, str_width, sim_tmpfile);
-if (s < bufsize)
-    buf[s] = '\0';
+sim_mfile = NULL;
+strlcpy (buf, mbuf.buf, MIN(bufsize, mbuf.pos + 1));
+free (mbuf.buf);
 return reason;
 }