diff --git a/src/ConsoleHelper.cpp b/src/ConsoleHelper.cpp
index bd16e27..00b84de 100644
--- a/src/ConsoleHelper.cpp
+++ b/src/ConsoleHelper.cpp
@@ -149,7 +149,7 @@ namespace YYCC::ConsoleHelper {
 			// anything else, use WriteFile instead.
 			// WriteFile do not need extra convertion, because it is direct writing.
 			// check whether string length is overflow
-			size_t strl_size = strl.size() * sizeof(std::string::value_type);
+			size_t strl_size = strl.size() * sizeof(yycc_u8string::value_type);
 			// write string with size check
 			if (strl_size <= std::numeric_limits<DWORD>::max()) {
 				WriteFile(hStdOut, strl.c_str(), static_cast<DWORD>(strl_size), &dwWrittenNumberOfChars, NULL);
diff --git a/src/DialogHelper.hpp b/src/DialogHelper.hpp
index 6dbe54a..993dc79 100644
--- a/src/DialogHelper.hpp
+++ b/src/DialogHelper.hpp
@@ -58,7 +58,7 @@ namespace YYCC::DialogHelper {
 		 * @brief Add a filter pair in file types list.
 		 * @param filter_name[in] The friendly name of the filter.
 		 * @param il[in] A C++ initialize list.
-		 * Every entries must be `const char*` represent a single filter pattern.
+		 * Every entries must be `const yycc_char8_t*` represent a single filter pattern.
 		 * The list at least should have one valid pattern.
 		 * This function will not validate these filter patterns, so please write them carefully.
 		 * @return True if added success, otherwise false.
diff --git a/src/ExceptionHelper.cpp b/src/ExceptionHelper.cpp
index 388f093..f02a6d9 100644
--- a/src/ExceptionHelper.cpp
+++ b/src/ExceptionHelper.cpp
@@ -273,9 +273,9 @@ namespace YYCC::ExceptionHelper {
 		// special proc for 2 exceptions
 		if (rec->ExceptionCode == EXCEPTION_ACCESS_VIOLATION || rec->ExceptionCode == EXCEPTION_IN_PAGE_ERROR) {
 			if (rec->NumberParameters >= 2) {
-				const char* op =
-					rec->ExceptionInformation[0] == 0 ? "read" :
-					rec->ExceptionInformation[0] == 1 ? "written" : "executed";
+				const yycc_char8_t* op =
+					rec->ExceptionInformation[0] == 0 ? YYCC_U8("read") :
+					rec->ExceptionInformation[0] == 1 ? YYCC_U8("written") : YYCC_U8("executed");
 				UExceptionErrLogFormatLine(fs, YYCC_U8("The data at memory address 0x%" PRI_XPTR_LEFT_PADDING PRIxPTR " could not be %s."),
 					rec->ExceptionInformation[1], op);
 			}