diff --git a/src/components/DiagramFrame/SeqDiagram/MessageLayer/Block/Statement/Fragment/FragmentAlt.vue b/src/components/DiagramFrame/SeqDiagram/MessageLayer/Block/Statement/Fragment/FragmentAlt.vue
index e56064e5e..27d9c71f4 100644
--- a/src/components/DiagramFrame/SeqDiagram/MessageLayer/Block/Statement/Fragment/FragmentAlt.vue
+++ b/src/components/DiagramFrame/SeqDiagram/MessageLayer/Block/Statement/Fragment/FragmentAlt.vue
@@ -210,13 +210,20 @@ export default {
       event.preventDefault();
       event.stopPropagation();
 
-      // Remove all whitespaces and check if the text is empty
-      const newText = event.target.innerText.replace(/\s/g, "").trim();
+      let newText = event.target.innerText.trim();
+
+      // if text is empty, we need to replace it with the original condition text
       if (newText === "") {
         event.target.innerText = conditionTextFromIfElseBlock(this);
         return;
       }
 
+      // if text has empty spaces, we need to wrap it with double quotes
+      if (newText.includes(" ")) {
+        newText = newText.replace(/"/g, "");
+        newText = `"${newText}"`;
+      }
+
       const condition = conditionFromIfElseBlock(block);
       const [start, end] = [condition?.start?.start, condition?.stop?.stop];
       updateCode(