diff --git a/crates/matrix-sdk-base/src/rooms/mod.rs b/crates/matrix-sdk-base/src/rooms/mod.rs
index b0aafcb87..cd884e9c8 100644
--- a/crates/matrix-sdk-base/src/rooms/mod.rs
+++ b/crates/matrix-sdk-base/src/rooms/mod.rs
@@ -66,7 +66,7 @@ pub enum RoomDisplayName {
 }
 
 const WHITESPACE_REGEX: &str = r"\s+";
-const INVALID_SYMBOLS_REGEX: &str = r"[#,:]+";
+const INVALID_SYMBOLS_REGEX: &str = r"[#,:\{\}\\]+";
 
 impl RoomDisplayName {
     /// Transforms the current display name into the name part of a
@@ -636,7 +636,7 @@ mod tests {
     fn test_room_alias_from_room_display_name_removes_invalid_ascii_symbols() {
         assert_eq!(
             "roomalias",
-            RoomDisplayName::Named("#Room,Alias:".to_owned()).to_room_alias_name()
+            RoomDisplayName::Named("#Room,{Alias}:".to_owned()).to_room_alias_name()
         );
     }
 }
diff --git a/crates/matrix-sdk/src/utils.rs b/crates/matrix-sdk/src/utils.rs
index 5c1a83ee5..327c04101 100644
--- a/crates/matrix-sdk/src/utils.rs
+++ b/crates/matrix-sdk/src/utils.rs
@@ -191,7 +191,7 @@ impl IntoRawStateEventContent for &Box<RawJsonValue> {
     }
 }
 
-const INVALID_ROOM_ALIAS_NAME_CHARS: &str = "#,:";
+const INVALID_ROOM_ALIAS_NAME_CHARS: &str = "#,:{}\\";
 
 /// Verifies the passed `String` matches the expected room alias format:
 ///
@@ -265,7 +265,7 @@ mod test {
 
     #[test]
     fn test_is_room_alias_format_valid_when_name_part_has_invalid_char_is_not_valid() {
-        assert!(!is_room_alias_format_valid("#alias,test:domain.org".to_owned()))
+        assert!(!is_room_alias_format_valid("#a#lias,{t\\est}:domain.org".to_owned()))
     }
 
     #[test]