diff --git a/pkg/ottl/ottlfuncs/README.md b/pkg/ottl/ottlfuncs/README.md
index 8a4ffafd3050..38f81cd748e0 100644
--- a/pkg/ottl/ottlfuncs/README.md
+++ b/pkg/ottl/ottlfuncs/README.md
@@ -246,7 +246,7 @@ Examples:
 
 ### replace_all_matches
 
-`replace_all_matches(target, pattern, replacement, Optional[function])`
+`replace_all_matches(target, pattern, replacement, Optional[function], Optional[replacementFormat])`
 
 The `replace_all_matches` function replaces any matching string value with the replacement string.
 
@@ -262,8 +262,7 @@ Examples:
 
 ### replace_all_patterns
 
-`replace_all_patterns(target, mode, regex, replacement, Optional[function])`
-`replace_all_patterns(target, mode, regex, replacement, function, replacementFormat)`
+`replace_all_patterns(target, mode, regex, replacement, Optional[function], Optional[replacementFormat])`
 
 The `replace_all_patterns` function replaces any segments in a string value or key that match the regex pattern with the replacement string.
 
@@ -291,7 +290,7 @@ If using OTTL outside of collector configuration, `$` should not be escaped and
 
 ### replace_match
 
-`replace_match(target, pattern, replacement, Optional[function])`
+`replace_match(target, pattern, replacement, Optional[function], Optional[replacementFormat])`
 
 The `replace_match` function allows replacing entire strings if they match a glob pattern.
 
@@ -309,9 +308,7 @@ Examples:
 
 ### replace_pattern
 
-`replace_pattern(target, regex, replacement, Optional[function])`
-`replace_pattern(target, regex, replacement, function)`
-`replace_pattern(target, regex, replacement, function, replacementFormat)`
+`replace_pattern(target, regex, replacement, Optional[function], Optional[replacementFormat])`
 
 The `replace_pattern` function allows replacing all string sections that match a regex pattern with a new value.