diff --git a/db/write_thread.h b/db/write_thread.h
index 51bb97f2a8d64ba27bcbb90e51f67d705a0fe4e4..57ce71e08f30afd5054547767d3131ca7216948e 100644
--- a/db/write_thread.h
+++ b/db/write_thread.h
@@ -55,7 +55,7 @@ class WriteThread {
 
     // The state used to inform a waiting writer that it has become a
     // parallel memtable writer. It can be the group leader who launch the
-    // praallel writer group, or one of the followers. The writer should then
+    // parallel writer group, or one of the followers. The writer should then
     // apply its batch to the memtable concurrently and call
     // CompleteParallelMemTableWriter.
     STATE_PARALLEL_MEMTABLE_WRITER = 8,