diff --git a/image_list.py b/image_list.py
index 22e7474..249a0fc 100755
--- a/image_list.py
+++ b/image_list.py
@@ -403,6 +403,7 @@ def find_fingerprint_similar(opts):
     db1.execute("SELECT file,fingerprint,sharpness,width,height,R,G,B FROM list WHERE sharpness > 0 ORDER BY file")
     hits=[]
     hit_list=[]
+    i=None
     for i,hit1 in enumerate(db1):
         if hit1[0] in hit_list:
             continue
@@ -431,7 +432,7 @@ def find_fingerprint_similar(opts):
             hits.append(this1)
             hit_list.append(cmp)
     
-    if i==0:
+    if i==None:
         print("No measurements found")
         sys.exit(1)