diff --git a/src/tsdb/src/tsdbFile.c b/src/tsdb/src/tsdbFile.c
index ff38920c8d8a8db7f93fc3b50b15f5a2b05ef868..c5c550e72d4f7602379134b380ef74983715bf3c 100644
--- a/src/tsdb/src/tsdbFile.c
+++ b/src/tsdb/src/tsdbFile.c
@@ -581,5 +581,5 @@ static TSKEY tsdbGetCurrMinKey(int8_t precision, int32_t keep) {
 }
 
 static int tsdbGetCurrMinFid(int8_t precision, int32_t keep, int32_t days) {
-  return TSDB_KEY_FILEID(tsdbGetCurrMinKey(precision, keep), days, precision);
+  return (int32_t)(TSDB_KEY_FILEID(tsdbGetCurrMinKey(precision, keep), days, precision));
 }
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