diff --git a/pvactools/lib/post_processor.py b/pvactools/lib/post_processor.py
index 53b4bec3..62bc3ffa 100644
--- a/pvactools/lib/post_processor.py
+++ b/pvactools/lib/post_processor.py
@@ -78,6 +78,7 @@ def identify_problematic_amino_acids(self):
 
     def aggregate_all_epitopes(self):
         if self.el_only:
+            print("WARNING: No binding affinity algorithm(s) specified, skipping aggregated report creation.")
             return
         print("Creating aggregated report")
         if self.file_type == 'pVACseq':