diff --git a/pixelstats/service.cpp b/pixelstats/service.cpp
index 23477f46..d78da5ba 100644
--- a/pixelstats/service.cpp
+++ b/pixelstats/service.cpp
@@ -28,6 +28,7 @@ using android::hardware::google::pixel::DropDetect;
 using android::hardware::google::pixel::SysfsCollector;
 using android::hardware::google::pixel::UeventListener;
 
+#define BLOCK_STATS_LENGTH 11
 #define UFSHC_PATH(filename) "/dev/sys/block/bootdevice/" #filename
 const struct SysfsCollector::SysfsPaths sysfs_paths = {
     .SlowioReadCntPath = UFSHC_PATH(slowio_read_cnt),