# Node ID 1ce6a4401f97ad42df13d37d731c92792ba567be
# Parent  cb151892ed2a265600833ff7fecd5bc6d69eab63
diff --git a/src/mem/ruby/structures/Cache.py b/src/mem/ruby/structures/Cache.py
--- a/src/mem/ruby/structures/Cache.py
+++ b/src/mem/ruby/structures/Cache.py
@@ -35,7 +35,7 @@
     cxx_class = 'CacheMemory'
     cxx_header = "mem/ruby/structures/CacheMemory.hh"
     size = Param.MemorySize("capacity in bytes");
-    latency = Param.Cycles("");
+    latency = Param.Cycles(0, ""); # latency is not used in most protocols
     assoc = Param.Int("");
     replacement_policy = Param.String("PSEUDO_LRU", "");
     start_index_bit = Param.Int(6, "index start, default 6 for 64-byte line");