diff --git a/app/models/user.rb b/app/models/user.rb
index ed107df41..47761ae88 100644
--- a/app/models/user.rb
+++ b/app/models/user.rb
@@ -50,7 +50,7 @@ def is_project_admin?()
   end
 
   def project_admin_of?(project)
-    project && admined_projects.any? {|ap| ap.id == project.id }
+    !!(project && admined_projects.any? {|ap| ap.id == project.id })
   end
 
   def most_recent_authentication
diff --git a/spec/models/user_spec.rb b/spec/models/user_spec.rb
index bc1b73389..29710b0b0 100644
--- a/spec/models/user_spec.rb
+++ b/spec/models/user_spec.rb
@@ -514,6 +514,7 @@
       expect(user.project_admins.length).to be(0)
       expect(user.admined_projects.length).to be(0)
 
+      expect(user.project_admin_of?(nil)).to be(false)
       expect(user.project_admin_of?(project1)).to be(false)
       expect(user.project_admin_of?(project2)).to be(false)
     end