diff --git a/cypress/integration/rendering/sequencediagram.spec.js b/cypress/integration/rendering/sequencediagram.spec.js
index 2625d19c1..5f12bacaf 100644
--- a/cypress/integration/rendering/sequencediagram.spec.js
+++ b/cypress/integration/rendering/sequencediagram.spec.js
@@ -39,12 +39,15 @@ context('Sequence diagram', () => {
       participant 1 as multiline<br>using #lt;br#gt;
       participant 2 as multiline<br/>using #lt;br/#gt;
       participant 3 as multiline<br />using #lt;br /#gt;
+      participant 4 as multiline<br \t/>using #lt;br \t/#gt;
       1->>2: multiline<br>using #lt;br#gt;
       note right of 2: multiline<br>using #lt;br#gt;
       2->>3: multiline<br/>using #lt;br/#gt;
       note right of 3: multiline<br/>using #lt;br/#gt;
-      3->>1: multiline<br />using #lt;br /#gt;
-      note right of 1: multiline<br />using #lt;br /#gt;
+      3->>4: multiline<br />using #lt;br /#gt;
+      note right of 4: multiline<br />using #lt;br /#gt;
+      4->>1: multiline<br />using #lt;br /#gt;
+      note right of 1: multiline<br \t/>using #lt;br \t/#gt;
     `,
       {}
     );
diff --git a/dist/index.html b/dist/index.html
index 0b3db789f..0dc845291 100644
--- a/dist/index.html
+++ b/dist/index.html
@@ -361,12 +361,15 @@ end
     participant 1 as multiline<br>using #lt;br#gt;
     participant 2 as multiline<br/>using #lt;br/#gt;
     participant 3 as multiline<br />using #lt;br /#gt;
+    participant 4 as multiline<br 	/>using #lt;br 	/#gt;
     1->>2: multiline<br>using #lt;br#gt;
     note right of 2: multiline<br>using #lt;br#gt;
     2->>3: multiline<br/>using #lt;br/#gt;
     note right of 3: multiline<br/>using #lt;br/#gt;
-    3->>1: multiline<br />using #lt;br /#gt;
-    note right of 1: multiline<br />using #lt;br /#gt;
+    3->>4: multiline<br />using #lt;br /#gt;
+    note right of 4: multiline<br />using #lt;br /#gt;
+    4->>1: multiline<br 	/>using #lt;br 	/#gt;
+    note right of 1: multiline<br 	/>using #lt;br 	/#gt;
   </div>
 
   <hr/>
diff --git a/src/diagrams/sequence/sequenceDiagram.spec.js b/src/diagrams/sequence/sequenceDiagram.spec.js
index 90875948b..2f1832865 100644
--- a/src/diagrams/sequence/sequenceDiagram.spec.js
+++ b/src/diagrams/sequence/sequenceDiagram.spec.js
@@ -339,12 +339,15 @@ describe('when parsing a sequenceDiagram', function() {
       'participant 1 as multiline<br>text\n' +
       'participant 2 as multiline<br/>text\n' +
       'participant 3 as multiline<br />text\n' +
+      'participant 4 as multiline<br \t/>text\n' +
       '1->>2: multiline<br>text\n' +
       'note right of 2: multiline<br>text\n' +
       '2->>3: multiline<br/>text\n' +
       'note right of 3: multiline<br/>text\n' +
-      '3->>1: multiline<br />text\n' +
-      'note right of 1: multiline<br />text\n';
+      '3->>4: multiline<br />text\n' +
+      'note right of 4: multiline<br />text\n' +
+      '4->>1: multiline<br \t/>text\n' +
+      'note right of 1: multiline<br \t/>text\n';
 
     parser.parse(str);
 
@@ -352,6 +355,7 @@ describe('when parsing a sequenceDiagram', function() {
     expect(actors['1'].description).toBe('multiline<br>text');
     expect(actors['2'].description).toBe('multiline<br/>text');
     expect(actors['3'].description).toBe('multiline<br />text');
+    expect(actors['4'].description).toBe('multiline<br \t/>text');
 
     const messages = parser.yy.getMessages();
     expect(messages[0].message).toBe('multiline<br>text');
@@ -360,6 +364,8 @@ describe('when parsing a sequenceDiagram', function() {
     expect(messages[3].message).toBe('multiline<br/>text');
     expect(messages[4].message).toBe('multiline<br />text');
     expect(messages[5].message).toBe('multiline<br />text');
+    expect(messages[6].message).toBe('multiline<br \t/>text');
+    expect(messages[7].message).toBe('multiline<br \t/>text');
   });
   it('it should handle notes over a single actor', function() {
     const str =