diff --git a/libraries/matrix/api/src/main/kotlin/io/element/android/libraries/matrix/api/core/MatrixPatterns.kt b/libraries/matrix/api/src/main/kotlin/io/element/android/libraries/matrix/api/core/MatrixPatterns.kt
index 4e6d468c54..bc0f0c04bc 100644
--- a/libraries/matrix/api/src/main/kotlin/io/element/android/libraries/matrix/api/core/MatrixPatterns.kt
+++ b/libraries/matrix/api/src/main/kotlin/io/element/android/libraries/matrix/api/core/MatrixPatterns.kt
@@ -34,7 +34,7 @@ object MatrixPatterns {
     val PATTERN_CONTAIN_MATRIX_USER_IDENTIFIER = MATRIX_USER_IDENTIFIER_REGEX.toRegex(RegexOption.IGNORE_CASE)
 
     // regex pattern to find room ids in a string.
-    private const val MATRIX_ROOM_IDENTIFIER_REGEX = "![A-Z0-9-]+$DOMAIN_REGEX"
+    private const val MATRIX_ROOM_IDENTIFIER_REGEX = "![A-Z0-9.-]+$DOMAIN_REGEX"
     private val PATTERN_CONTAIN_MATRIX_ROOM_IDENTIFIER = MATRIX_ROOM_IDENTIFIER_REGEX.toRegex(RegexOption.IGNORE_CASE)
 
     // regex pattern to find room aliases in a string.