diff --git a/db/config.hh b/db/config.hh
index 5920cd3294..b9676f6cb8 100644
--- a/db/config.hh
+++ b/db/config.hh
@@ -739,7 +739,7 @@ public:
         " Performance is affected to some extent as a result. Useful to help debugging problems that may arise at another layers.") \
     val(cpu_scheduler, bool, true, Used, "Enable cpu scheduling") \
     val(view_building, bool, true, Used, "Enable view building; should only be set to false when the node is experience issues due to view building") \
-    val(enable_sstables_mc_format, bool, false, Used, "Enable SSTables 'mc' format to be used as the default file format; FOR TESTING PURPOSES ONLY - TO BE REMOVED BEFORE RELEASE") \
+    val(enable_sstables_mc_format, bool, true, Used, "Enable SSTables 'mc' format to be used as the default file format; FOR TESTING PURPOSES ONLY - TO BE REMOVED BEFORE RELEASE") \
     /* done! */
 
 #define _make_value_member(name, type, deflt, status, desc, ...)    \