diff --git a/src/system/helpers.cpp b/src/system/helpers.cpp
index e101cc8b9..1a9eb11b9 100644
--- a/src/system/helpers.cpp
+++ b/src/system/helpers.cpp
@@ -613,16 +613,16 @@ std::string trim(std::string &str, const std::string &trimChars /*= " \n\r\t"*/)
 	return result.erase(0, result.find_first_not_of(trimChars));
 }
 
-std::string ltrim(std::string& str, const std::string& trimChars)
+std::string ltrim(std::string &str, const std::string &trimChars)
 {
 	str.erase(0, str.find_first_not_of(trimChars));
 	return str;
 }
 
-std::string rtrim(std::string& str, const std::string& trimChars)
+std::string rtrim(std::string &str, const std::string &trimChars)
 {
-    str.erase(str.find_last_not_of(trimChars) + 1);
-    return str;
+	str.erase(str.find_last_not_of(trimChars) + 1);
+	return str;
 }
 
 std::string cutString(const std::string str, int msgFont, const int width)
diff --git a/src/system/helpers.h b/src/system/helpers.h
index e5d8cd3a8..0afbeea09 100644
--- a/src/system/helpers.h
+++ b/src/system/helpers.h
@@ -71,9 +71,9 @@ std::string getBaseName(std::string &path);
 std::string getFileName(std::string &file);
 std::string getFileExt(std::string &file);
 std::string getNowTimeStr(const char* format);
-std::string trim(std::string& str, const std::string& trimChars = " \n\r\t");
-std::string ltrim(std::string& str, const std::string& trimChars = " \n\r\t");
-std::string rtrim(std::string& str, const std::string& trimChars = " \n\r\t");
+std::string trim(std::string &str, const std::string &trimChars = " \n\r\t");
+std::string ltrim(std::string &str, const std::string &trimChars = " \n\r\t");
+std::string rtrim(std::string &str, const std::string &trimChars = " \n\r\t");
 std::string cutString(const std::string str, int msgFont, const int width);
 std::string strftime(const char *format, const struct tm *tm);
 std::string strftime(const char *format, time_t when, bool gm = false);