diff --git a/bgpd/bgp_ecommunity.c b/bgpd/bgp_ecommunity.c
index 8d5fa74..e7eb0a0 100644
--- a/bgpd/bgp_ecommunity.c
+++ b/bgpd/bgp_ecommunity.c
@@ -619,6 +619,13 @@
 
   for (i = 0; i < ecom->size; i++)
     {
+      /* Make it sure size is enough.  */
+      while (str_pnt + ECOMMUNITY_STR_DEFAULT_LEN >= str_size)
+	{
+	  str_size *= 2;
+	  str_buf = XREALLOC (MTYPE_ECOMMUNITY_STR, str_buf, str_size);
+	}
+
       /* Space between each value.  */
       if (! first)
 	str_buf[str_pnt++] = ' ';
@@ -662,13 +669,6 @@
 	  break;
 	}
 
-      /* Make it sure size is enough.  */
-      while (str_pnt + ECOMMUNITY_STR_DEFAULT_LEN >= str_size)
-	{
-	  str_size *= 2;
-	  str_buf = XREALLOC (MTYPE_ECOMMUNITY_STR, str_buf, str_size);
-	}
-
       /* Put string into buffer.  */
       if (encode == ECOMMUNITY_ENCODE_AS4)
 	{