diff --git a/src/libCom/dbmf/dbmf.c b/src/libCom/dbmf/dbmf.c
index 3dbaace50..e52f62571 100644
--- a/src/libCom/dbmf/dbmf.c
+++ b/src/libCom/dbmf/dbmf.c
@@ -33,7 +33,7 @@ typedef struct itemHeader{
 
 typedef struct dbmfPrivate {
     ELLLIST    chunkList;
-    semId      sem;
+    semMutexId sem;
     size_t     size;
     size_t     allocSize;
     int        chunkItems;