diff --git a/coastsnap/images_snapshot.py b/coastsnap/images_snapshot.py
index 0a6f6cc..5d15306 100644
--- a/coastsnap/images_snapshot.py
+++ b/coastsnap/images_snapshot.py
@@ -107,7 +107,11 @@ for site in os.listdir(images_dir): # Loop through SITES
 
 # Add site stability data (# registered / # processed)
 for i, row in stats_csv.iterrows():    
-    stability = "{0:.0%}".format(stats_csv.at[i, '# registered'] / stats_csv.at[i, '# photoshop'])
+    
+    if stats_csv.at[i, '# photoshop'] != 0:
+            stability = "{0:.0%}".format(stats_csv.at[i, '# registered'] / stats_csv.at[i, '# photoshop'])
+    else:
+        stability = 'NaN'  # or whatever value makes sense in your context
     stats_csv.at[i,'stability'] = stability
     
 stats_csv.set_index('site', inplace = True)