diff --git a/app/logical/post_query_builder.rb b/app/logical/post_query_builder.rb
index 29d3b872f..26b62624a 100644
--- a/app/logical/post_query_builder.rb
+++ b/app/logical/post_query_builder.rb
@@ -340,19 +340,23 @@ class PostQueryBuilder
       relation = relation.order("position(' '||posts.id||' ' in ' '||(select post_ids from pools where id = #{pool_id})||' ')")
     end
 
-    if q[:favgroup_neg].present?
-      favgroup_id = q[:favgroup_neg].to_i
-      favgroup = FavoriteGroup.where("favorite_groups.id = ?", favgroup_id).first
-      if favgroup
-        relation = relation.where("posts.id NOT in (?)", favgroup.post_id_array)
+    if q[:favgroups_neg].present?
+      q[:favgroups_neg].each do |favgroup_rec|
+        favgroup_id = favgroup_rec.to_i
+        favgroup = FavoriteGroup.where("favorite_groups.id = ?", favgroup_id).first
+        if favgroup
+          relation = relation.where("posts.id NOT in (?)", favgroup.post_id_array)
+        end
       end
     end
 
-    if q[:favgroup].present?
-      favgroup_id = q[:favgroup].to_i
-      favgroup = FavoriteGroup.where("favorite_groups.id = ?", favgroup_id).first
-      if favgroup
-        relation = relation.where("posts.id in (?)", favgroup.post_id_array)
+    if q[:favgroups].present?
+      q[:favgroups].each do |favgroup_rec|
+        favgroup_id = favgroup_rec.to_i
+        favgroup = FavoriteGroup.where("favorite_groups.id = ?", favgroup_id).first
+        if favgroup
+          relation = relation.where("posts.id in (?)", favgroup.post_id_array)
+        end
       end
     end
 
diff --git a/app/models/tag.rb b/app/models/tag.rb
index f6d293707..18e7df76c 100644
--- a/app/models/tag.rb
+++ b/app/models/tag.rb
@@ -487,11 +487,13 @@ class Tag < ActiveRecord::Base
 
           when "-favgroup"
             favgroup_id = FavoriteGroup.name_to_id($2)
-            q[:favgroup_neg] = favgroup_id
+            q[:favgroups_neg] ||= []
+            q[:favgroups_neg] << favgroup_id
 
           when "favgroup"
             favgroup_id = FavoriteGroup.name_to_id($2)
-            q[:favgroup] = favgroup_id
+            q[:favgroups] ||= []
+            q[:favgroups] << favgroup_id
 
           when "-fav"
             q[:tags][:exclude] << "fav:#{User.name_to_id($2)}"