diff --git a/block/blk-core.c b/block/blk-core.c
index 3564de78f1028d51dbcee8999abfc769345f9004..f91f8e8be482d1c93809ddb936437db45c0d8c91 100644
--- a/block/blk-core.c
+++ b/block/blk-core.c
@@ -62,7 +62,7 @@ EXPORT_TRACEPOINT_SYMBOL_GPL(block_unplug);
 
 DEFINE_IDA(blk_queue_ida);
 
-bool precise_iostat;
+bool precise_iostat = true;
 
 static int __init precise_iostat_setup(char *str)
 {