diff --git a/src/os/src/detail/osTime.c b/src/os/src/detail/osTime.c
index e25178f2d552cc2bbfaf16834a070a97496fa6fd..073d0eed896da9dd0ec06ecb1cd0f4d803e4aefa 100644
--- a/src/os/src/detail/osTime.c
+++ b/src/os/src/detail/osTime.c
@@ -337,7 +337,8 @@ int32_t parseLocaltime(char* timestr, int64_t* time, int32_t timePrec, char deli
 
   if (str == NULL) {
     //if parse failed, try "%Y-%m-%d" format
-    if (!strptime(timestr, "%Y-%m-%d", &tm)) {
+    str = strptime(timestr, "%Y-%m-%d", &tm);
+    if (str == NULL) {
       return -1;
     }
   }
@@ -382,7 +383,8 @@ int32_t parseLocaltimeWithDst(char* timestr, int64_t* time, int32_t timePrec, ch
 
   if (str == NULL) {
     //if parse failed, try "%Y-%m-%d" format
-    if (!strptime(timestr, "%Y-%m-%d", &tm)) {
+    str = strptime(timestr, "%Y-%m-%d", &tm);
+    if (str == NULL) {
       return -1;
     }
   }