diff --git a/src/inc/tsync.h b/src/inc/tsync.h
index 11b81f9379..671adefab8 100644
--- a/src/inc/tsync.h
+++ b/src/inc/tsync.h
@@ -68,7 +68,7 @@ typedef uint32_t (*FGetFileInfo)(void *ahandle, char *name, uint32_t *index, uin
 
 // get the wal file from index or after
 // return value, -1: error, 1:more wal files, 0:last WAL. if name[0]==0, no WAL file
-typedef int      (*FGetWalInfo)(void *ahandle, char *name, int64_t *index); 
+typedef int32_t  (*FGetWalInfo)(void *ahandle, char *fileName, int64_t *fileId); 
  
 // when a forward pkt is received, call this to handle data 
 typedef int      (*FWriteToCache)(void *ahandle, void *pHead, int type);
diff --git a/src/inc/twal.h b/src/inc/twal.h
index b87831381d..94bdcacfce 100644
--- a/src/inc/twal.h
+++ b/src/inc/twal.h
@@ -41,7 +41,6 @@ typedef struct {
   int8_t  walLevel;     // wal level
   int8_t  wals;         // number of WAL files;
   int8_t  keep;         // keep the wal file when closed
-  int8_t  reserved[5];
 } SWalCfg;
 
 typedef void* twalh;  // WAL HANDLE
diff --git a/src/mnode/src/mnodeSdb.c b/src/mnode/src/mnodeSdb.c
index a04c161599..e3c13505e4 100644
--- a/src/mnode/src/mnodeSdb.c
+++ b/src/mnode/src/mnodeSdb.c
@@ -237,8 +237,8 @@ static uint32_t sdbGetFileInfo(void *ahandle, char *name, uint32_t *index, uint3
   return 0;
 }
 
-static int sdbGetWalInfo(void *ahandle, char *name, int64_t *index) {
-  return walGetWalFile(tsSdbObj.wal, name, index);
+static int32_t sdbGetWalInfo(void *ahandle, char *fileName, int64_t *fileId) {
+  return walGetWalFile(tsSdbObj.wal, fileName, fileId);
 }
 
 static void sdbNotifyRole(void *ahandle, int8_t role) {
diff --git a/src/sync/test/syncServer.c b/src/sync/test/syncServer.c
index 9ae45b25e3..0cf752da97 100644
--- a/src/sync/test/syncServer.c
+++ b/src/sync/test/syncServer.c
@@ -254,7 +254,7 @@ uint32_t getFileInfo(void *ahandle, char *name, uint32_t *index, uint32_t eindex
   return magic;
 }
 
-int getWalInfo(void *ahandle, char *name, uint64_t *index) {
+int getWalInfo(void *ahandle, char *name, int64_t *index) {
   struct stat fstat;
   char        aname[280];
 
diff --git a/src/vnode/src/vnodeMain.c b/src/vnode/src/vnodeMain.c
index 2d5ec98a80..40eeeb4ed7 100644
--- a/src/vnode/src/vnodeMain.c
+++ b/src/vnode/src/vnodeMain.c
@@ -42,7 +42,7 @@ static int32_t  vnodeSaveVersion(SVnodeObj *pVnode);
 static int32_t  vnodeReadVersion(SVnodeObj *pVnode);
 static int      vnodeProcessTsdbStatus(void *arg, int status);
 static uint32_t vnodeGetFileInfo(void *ahandle, char *name, uint32_t *index, uint32_t eindex, int64_t *size, uint64_t *fversion);
-static int      vnodeGetWalInfo(void *ahandle, char *name, int64_t *index);
+static int      vnodeGetWalInfo(void *ahandle, char *fileName, int64_t *fileId);
 static void     vnodeNotifyRole(void *ahandle, int8_t role);
 static void     vnodeCtrlFlow(void *handle, int32_t mseconds); 
 static int      vnodeNotifyFileSynced(void *ahandle, uint64_t fversion);
@@ -622,9 +622,9 @@ static uint32_t vnodeGetFileInfo(void *ahandle, char *name, uint32_t *index, uin
   return tsdbGetFileInfo(pVnode->tsdb, name, index, eindex, size);
 }
 
-static int vnodeGetWalInfo(void *ahandle, char *name, int64_t *index) {
+static int vnodeGetWalInfo(void *ahandle, char *fileName, int64_t *fileId) {
   SVnodeObj *pVnode = ahandle;
-  return walGetWalFile(pVnode->wal, name, index);
+  return walGetWalFile(pVnode->wal, fileName, fileId);
 }
 
 static void vnodeNotifyRole(void *ahandle, int8_t role) {
diff --git a/src/wal/src/walWrite.c b/src/wal/src/walWrite.c
index 45f00def06..70bcc49593 100644
--- a/src/wal/src/walWrite.c
+++ b/src/wal/src/walWrite.c
@@ -58,7 +58,7 @@ int32_t walRenew(void *handle) {
 
   if (!pWal->keep && lastId != -1) {
     // remove last wal file
-    char name[TSDB_FILENAME_LEN + 20];
+    char name[WAL_FILE_LEN];
     snprintf(name, sizeof(name), "%s/%s%" PRId64, pWal->path, WAL_PREFIX, lastId);
     if (remove(name) < 0) {
       wError("vgId:%d, file:%s, failed to remove since %s", pWal->vgId, name, strerror(errno));
diff --git a/src/wal/test/waltest.c b/src/wal/test/waltest.c
index ba0011af29..186f2ef5ff 100644
--- a/src/wal/test/waltest.c
+++ b/src/wal/test/waltest.c
@@ -116,7 +116,7 @@ int main(int argc, char *argv[]) {
   printf("%d wal files are written\n", total);
 
   int64_t index = 0;
-  char     name[256];
+  char    name[256];
 
   while (1) {
     int code = walGetWalFile(pWal, name, &index);