diff --git a/core/views/site.py b/core/views/site.py
index 3b75cdde..133f1647 100644
--- a/core/views/site.py
+++ b/core/views/site.py
@@ -71,7 +71,7 @@ def notification(request, notif_id):
 
 
 def search_user(query, as_json=False):
-    if query == "":
+    if query == "" or query.isspace():
         return []
     res = SearchQuerySet().models(User).autocomplete(auto=query)[:20]
     return [r.object for r in res]
diff --git a/forum/views.py b/forum/views.py
index 030f39ec..a89a547d 100644
--- a/forum/views.py
+++ b/forum/views.py
@@ -56,7 +56,7 @@ class ForumSearchView(ListView):
         query = self.request.GET.get("query", "")
         order_by = self.request.GET.get("order", "")
 
-        if query == "":
+        if query == "" or query.isspace():
             return []
 
         queryset = RelatedSearchQuerySet().models(ForumMessage).autocomplete(auto=query)