diff --git a/docs/en/sql-reference/functions/string-search-functions.md b/docs/en/sql-reference/functions/string-search-functions.md
index 3e1a6586e03..7617f0d7b68 100644
--- a/docs/en/sql-reference/functions/string-search-functions.md
+++ b/docs/en/sql-reference/functions/string-search-functions.md
@@ -552,7 +552,7 @@ countSubstrings(haystack, needle[, start_pos])
 
 -   `haystack` — The string to search in. [String](../../sql-reference/syntax.md#syntax-string-literal).
 -   `needle` — The substring to search for. [String](../../sql-reference/syntax.md#syntax-string-literal).
--   `start_pos` – Optional parameter, position of the first character in the string to start search. [UInt](../../sql-reference/data-types/int-uint.md).
+-   `start_pos` – Position of the first character in the string to start search. Optional. [UInt](../../sql-reference/data-types/int-uint.md).
 
 **Returned values**
 
@@ -618,7 +618,7 @@ countSubstringsCaseInsensitive(haystack, needle[, start_pos])
 
 -   `haystack` — The string to search in. [String](../../sql-reference/syntax.md#syntax-string-literal).
 -   `needle` — The substring to search for. [String](../../sql-reference/syntax.md#syntax-string-literal).
--   `start_pos` – Optional parameter, position of the first character in the string to start search. [UInt](../../sql-reference/data-types/int-uint.md).
+-   `start_pos` – Position of the first character in the string to start search. Optional. [UInt](../../sql-reference/data-types/int-uint.md).
 
 **Returned values**
 
@@ -684,7 +684,7 @@ SELECT countSubstringsCaseInsensitiveUTF8(haystack, needle[, start_pos])
 
 -   `haystack` — The string to search in. [String](../../sql-reference/syntax.md#syntax-string-literal).
 -   `needle` — The substring to search for. [String](../../sql-reference/syntax.md#syntax-string-literal).
--   `start_pos` – Optional parameter, position of the first character in the string to start search. [UInt](../../sql-reference/data-types/int-uint.md).
+-   `start_pos` – Position of the first character in the string to start search. Optional. [UInt](../../sql-reference/data-types/int-uint.md).
 
 **Returned values**