diff --git a/common/string_util.cpp b/common/string_util.cpp
index 1ce84dcfb..e791eb7f6 100644
--- a/common/string_util.cpp
+++ b/common/string_util.cpp
@@ -408,7 +408,7 @@ bool isAlphaNumeric(const char *text)
 	return true;
 }
 
-void find_replace(std::string& string_subject, std::string& search_string, std::string& replace_string) {
+void find_replace(std::string& string_subject, const std::string& search_string, const std::string& replace_string) {
 	auto index = string_subject.find_first_of(search_string);
 	while (index != std::string::npos) {
 		string_subject.replace(index, index + 1, replace_string);