diff --git a/app/views/api/v1/projects/pipelines/build_pipeline.yaml.erb b/app/views/api/v1/projects/pipelines/build_pipeline.yaml.erb
index 9690d1cb7..c08455162 100644
--- a/app/views/api/v1/projects/pipelines/build_pipeline.yaml.erb
+++ b/app/views/api/v1/projects/pipelines/build_pipeline.yaml.erb
@@ -19,6 +19,8 @@ on:
   <% end %>
   <%if node.name.to_s.include?("on-pull_request") && node.input_values.present? %>
   pull_request:
+    types:
+      - opened
     <% node.input_values.each_key do |key| %>
     <%=key %>:
       <% if node.input_values[key].blank? %>