diff --git a/docs/en/14-reference/03-taos-sql/10-function.md b/docs/en/14-reference/03-taos-sql/10-function.md
index 2ba3c416fd..d2efd668b0 100644
--- a/docs/en/14-reference/03-taos-sql/10-function.md
+++ b/docs/en/14-reference/03-taos-sql/10-function.md
@@ -1187,7 +1187,7 @@ CSUM(expr)
 ### DERIVATIVE
 
 ```sql
-DERIVATIVE(expr, time_inerval, ignore_negative)
+DERIVATIVE(expr, time_interval, ignore_negative)
 
 ignore_negative: {
     0