diff --git a/app/models/impediment.rb b/app/models/impediment.rb
index 5d2e296348..1a6f040233 100644
--- a/app/models/impediment.rb
+++ b/app/models/impediment.rb
@@ -49,16 +49,14 @@ class Impediment < Task
   end
 
   def blocks_ids
-    @blocks_ids_list ||= relations_from.select{ |rel| rel.relation_type == IssueRelation::TYPE_BLOCKS }
+    @blocks_ids_list ||= relations_from.select{ |rel| rel.relation_type == IssueRelation::TYPE_BLOCKS }.collect(&:issue_to_id)
   end
 
   def update_with_relationships(params)
-    attribs = params.clone.delete_if { |k, v| !safe_attribute_names.include?(k) }
+    attribs = params.reject { |k, v| !safe_attribute_names.include?(k.to_s) }
 
     attribs[:remaining_hours] = 0 if IssueStatus.find(params[:status_id]).is_closed?
 
-    attribs[:blocks_ids] = params[:blocks] if params[:blocks] #if blocks param was not sent, that means the impediment was just dragged
-
     result = journalized_update_attributes(attribs)
 
     move_after params[:prev] if result
diff --git a/spec/models/impediment_spec.rb b/spec/models/impediment_spec.rb
index d31fb28793..902281dc6c 100644
--- a/spec/models/impediment_spec.rb
+++ b/spec/models/impediment_spec.rb
@@ -250,6 +250,21 @@ describe Impediment do
           impediment.blocks_ids.should eql [1,2,3]
         end
       end
+
+      describe "WITH only prior blockers defined" do
+        before(:each) do
+          feature.fixed_version = version
+          feature.save
+          task.fixed_version = version
+          task.save
+
+          impediment.relations_from = [IssueRelation.new(:issue_from => impediment, :issue_to => feature, :relation_type => IssueRelation::TYPE_BLOCKS),
+                                       IssueRelation.new(:issue_from => impediment, :issue_to => task, :relation_type => IssueRelation::TYPE_BLOCKS)]
+          true
+        end
+
+        it { impediment.blocks_ids.should eql [feature.id, task.id] }
+      end
     end
   end
 end
\ No newline at end of file