diff --git a/include/client.h b/include/client.h
index 8f37090..26809f3 100644
--- a/include/client.h
+++ b/include/client.h
@@ -121,8 +121,8 @@ struct ZipStats
 
 struct MetadataEntry
 {
-	char key[NICKLEN+1];
-	char value[TOPICLEN];
+	char key[METADATAKEYLEN];
+	char value[METADATAVALUELEN];
 };
 
 struct Client
diff --git a/include/ircd_defs.h b/include/ircd_defs.h
index 071c92f..cb26b95 100644
--- a/include/ircd_defs.h
+++ b/include/ircd_defs.h
@@ -111,6 +111,13 @@
 #define BANREASONLEN	390	/* kline/dline */
 #define AWAYLEN		TOPICLEN
 #define KILLLEN         200	/* with Killed (nick ()) added this should fit in quit */
+#define METADATAKEYLEN	31
+/* :012345678901234567890123456789012345678901234567890123456789123 792 * 012345678901234567890123456789 012345678901234567890123456789 :
+ * takes at most 137 bytes
+ * :123456789 ENCAP * PRESENCE 012345678901234567890123456789 :
+ * takes at most 63 bytes
+ * */
+#define METADATAVALUELEN 300
 
 /* 23+1 for \0 */
 #define KEYLEN          24
diff --git a/src/client.c b/src/client.c
index 32f950a..a395ec8 100644
--- a/src/client.c
+++ b/src/client.c
@@ -1753,15 +1753,15 @@ set_metadata(struct Client *client_p, const char *key, const char *value)
 		if (md == NULL)
 		{
 			md = rb_bh_alloc(metadata_heap);
-			rb_strlcpy(md->key, key, NICKLEN);
+			rb_strlcpy(md->key, key, sizeof md->key);
 			irc_dictionary_add(client_p->user->metadata, md->key, md);
 		}
 		else if (!strcmp(md->key, key) && !strcmp(md->value, value))
 			return;
 		else
-			rb_strlcpy(md->key, key, NICKLEN);
+			rb_strlcpy(md->key, key, sizeof md->key);
 
-		rb_strlcpy(md->value, value, TOPICLEN);
+		rb_strlcpy(md->value, value, sizeof md->value);
 	}
 
 	sendto_common_channels_local_with_capability(client_p, CLICAP_PRESENCE, form_str(RPL_METADATACHG), me.name, client_p->name, key, value);