diff --git a/src/tsdb/src/tsdbMain.c b/src/tsdb/src/tsdbMain.c
index 063c584220fe40c1368b235d1ad40b58ff5c9ab0..81b004ce3c3ece66437717acdadbfff1e5bec4ac 100644
--- a/src/tsdb/src/tsdbMain.c
+++ b/src/tsdb/src/tsdbMain.c
@@ -306,7 +306,7 @@ int tsdbGetState(TSDB_REPO_T *repo) {
 
 // ----------------- INTERNAL FUNCTIONS -----------------
 char *tsdbGetMetaFileName(char *rootDir) {
-  int   tlen = (int)(strlen(TFS_PRIMARY_PATH()) + strlen(rootDir) + strlen(TSDB_META_FILE_NAME) + 2);
+  int   tlen = (int)(strlen(TFS_PRIMARY_PATH()) + strlen(rootDir) + strlen(TSDB_META_FILE_NAME) + 3);
   char *fname = calloc(1, tlen);
   if (fname == NULL) {
     terrno = TSDB_CODE_TDB_OUT_OF_MEMORY;