diff --git a/src/tsdb/src/tsdbCommit.c b/src/tsdb/src/tsdbCommit.c
index 02dd2d1ca40a04dd1102f884bae528916b522272..09faff1c8482a089bb1c6d249a820c1f4401a3e0 100644
--- a/src/tsdb/src/tsdbCommit.c
+++ b/src/tsdb/src/tsdbCommit.c
@@ -17,7 +17,7 @@
 #define TSDB_MAX_SUBBLOCKS 8
 static FORCE_INLINE int TSDB_KEY_FID(TSKEY key, int32_t days, int8_t precision) {
   if (key < 0) {
-    return (int)(-((-key) / tsMsPerDay[precision] / days + 1));
+    return (int)(((key + 1) / tsMsPerDay[precision] / days + 1));
   } else {
     return (int)((key / tsMsPerDay[precision] / days));
   }