diff --git a/modules/cef/filterx-func-parse-cef.h b/modules/cef/filterx-func-parse-cef.h
index 84c229237..1d235bc80 100644
--- a/modules/cef/filterx-func-parse-cef.h
+++ b/modules/cef/filterx-func-parse-cef.h
@@ -28,8 +28,8 @@
 #include "filterx/expr-function.h"
 
 #define FILTERX_FUNC_PARSE_CEF_USAGE "Usage: parse_cef(str " \
-        EVENT_FORMAT_PARSER_ARG_NAME_PAIR_SEPARATOR"=boolean, " \
-        EVENT_FORMAT_PARSER_ARG_NAME_VALUE_SEPARATOR"=boolean)"
+        EVENT_FORMAT_PARSER_ARG_NAME_PAIR_SEPARATOR"=string, " \
+        EVENT_FORMAT_PARSER_ARG_NAME_VALUE_SEPARATOR"=string)"
 
 FILTERX_GENERATOR_FUNCTION_DECLARE(parse_cef);
 
diff --git a/modules/cef/filterx-func-parse-leef.h b/modules/cef/filterx-func-parse-leef.h
index c7c43fbc4..99a5e6052 100644
--- a/modules/cef/filterx-func-parse-leef.h
+++ b/modules/cef/filterx-func-parse-leef.h
@@ -28,8 +28,8 @@
 #include "filterx/expr-function.h"
 
 #define FILTERX_FUNC_PARSE_LEEF_USAGE "Usage: parse_leef(str " \
-        EVENT_FORMAT_PARSER_ARG_NAME_PAIR_SEPARATOR"=boolean, " \
-        EVENT_FORMAT_PARSER_ARG_NAME_VALUE_SEPARATOR"=boolean)"
+        EVENT_FORMAT_PARSER_ARG_NAME_PAIR_SEPARATOR"=string, " \
+        EVENT_FORMAT_PARSER_ARG_NAME_VALUE_SEPARATOR"=string)"
 
 FILTERX_GENERATOR_FUNCTION_DECLARE(parse_leef);