diff --git a/CMakeLists.txt b/CMakeLists.txt
index 365c023e46..c5ac6f6e85 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -821,6 +821,13 @@ endif()
 
 set(TINYGETTEXT_WO_ICONV ON)
 add_subdirectory(core/deps/tinygettext EXCLUDE_FROM_ALL)
+if(MSVC)
+	# language.cpp holds the native language names as non-ASCII literals. MSVC
+	# decodes sources without a BOM using the active code page, so on a non-UTF-8
+	# system locale those literals break the build (C2001/C2064). The main target
+	# already passes /utf-8; this dependency needs it too.
+	target_compile_options(tinygettext PRIVATE /utf-8)
+endif()
 target_include_directories(${PROJECT_NAME} PRIVATE core/deps/tinygettext/include)
 target_link_libraries(${PROJECT_NAME} PRIVATE tinygettext::tinygettext)