diff --git a/component/core/src/main/java/org/exoplatform/social/core/space/SpaceListAccess.java b/component/core/src/main/java/org/exoplatform/social/core/space/SpaceListAccess.java
index 7ee20a38618..949725840d7 100644
--- a/component/core/src/main/java/org/exoplatform/social/core/space/SpaceListAccess.java
+++ b/component/core/src/main/java/org/exoplatform/social/core/space/SpaceListAccess.java
@@ -298,7 +298,7 @@ private SpaceSearchFilter getSpaceSearchFilter() {
             || type == ACCESSIBLE
             || type == VISIBLE
             || statusType != null)) {
-      return new SpaceSearchFilter(username,
+      return new SpaceSearchFilter(username.toLowerCase(),
                                    filter.getIdentityId(),
                                    filter.getTemplateId(),
                                    filter.getManagingTemplateIds(),