Yes, you can fix this. You need Vetericyn, super glue, a tea bag, and a good helper. Maybe two to hold the patient very still.
First spray with Vetericyn and be sure all dirt and debris are removed from the wound, using a Q-tip to clean out the fractured beak. Be aware that this sort of injury is very painful. You might want to administer one baby aspirin to the patient before starting. Make sure the beak is dry before continuing to the next step.
Take the tea bag and dump the tea out and toss it. Open the paper bag and cut a square piece to fit over the split beak. This will be your "splint".
Next you will super glue the paper patch to one half of the broken beak. Hold in place until it sets, about 60 seconds. Then carefully put a tiny bit of glue in the hinge of the break and on the rest of the paper patch. Bring the beak back to its proper position and smooth the paper patch over it. Hold for 60 seconds to set.
The beak will heal over the next few weeks and the paper will harmlessly wear off and fall away.