diff --git a/app/controllers/proposal_controller.rb b/app/controllers/proposal_controller.rb
index 95042af5..64e34196 100644
--- a/app/controllers/proposal_controller.rb
+++ b/app/controllers/proposal_controller.rb
@@ -26,16 +26,7 @@ class ProposalController < ApplicationController
   def create
     @url = conference_program_proposal_index_path(@conference.short_title)
 
-    unless current_user
-      @user = User.new(user_params)
-      if @user.save
-        sign_in(@user)
-      else
-        flash[:error] = "Could not save user: #{@user.errors.full_messages.join(', ')}"
-        render action: 'new'
-        return
-      end
-    end
+    create_user_if_not_signed_in
 
     params[:event].delete :user
 
@@ -146,6 +137,19 @@ class ProposalController < ApplicationController
   def user_params
     params.require(:user).permit(:email, :password, :password_confirmation, :username)
   end
+
+  def create_user_if_not_signed_in
+    unless current_user
+      @user = User.new(user_params)
+      if @user.save
+        sign_in(@user)
+      else
+        flash[:error] = "Could not save user: #{@user.errors.full_messages.join(', ')}"
+        render action: 'new'
+        return
+      end
+    end
+  end
 end
 
 # FIXME: Introduce strong_parameters pronto!