diff --git a/fuzzers/074-dump_all/reduce_tile_types.py b/fuzzers/074-dump_all/reduce_tile_types.py
index a152e20f..fdaa0f99 100644
--- a/fuzzers/074-dump_all/reduce_tile_types.py
+++ b/fuzzers/074-dump_all/reduce_tile_types.py
@@ -323,7 +323,7 @@ def annotate_wires_speed_model(wires, speed_data):
 
         cap = wire_speed_data['cap']
         res = wire_speed_data['res']
-        if cap != '0.000' and res != '0.000':
+        if cap != '0.000' or res != '0.000':
             wires[wire_name] = {
                 'cap': cap,
                 'res': res,