diff --git a/packages/mermaid/src/diagrams/state/dataFetcher.js b/packages/mermaid/src/diagrams/state/dataFetcher.js
index 342b76125..3bdf1abe0 100644
--- a/packages/mermaid/src/diagrams/state/dataFetcher.js
+++ b/packages/mermaid/src/diagrams/state/dataFetcher.js
@@ -216,7 +216,7 @@ function getClassesFromDbInfo(dbInfoItem) {
         }
         //add comma for all other classes
         else {
-          classStr += dbInfoItem.classes[i] + ',';
+          classStr += dbInfoItem.classes[i] + ' ';
         }
       }
       return classStr;