diff --git a/CMakeLists.txt b/CMakeLists.txt
index fd7600401..799a3177a 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -35,18 +35,10 @@ set(CMAKE_RUNTIME_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/bin)
 if(MSVC)
     add_compile_definitions(_CRT_SECURE_NO_WARNINGS)
     add_compile_options(/arch:SSE2)
-    # Pin both charsets. Sources are UTF-8; narrow string literals are Windows-1252,
-    # because the .vf bitmap fonts are indexed by Windows-1252 byte value and several
-    # literals embed those bytes directly (\x95 bullet, \xA6 chat prefix, ...).
-    # Without this the ordinary literal encoding follows the build machine's system
-    # code page: on a DBCS locale such as 932 those bytes become invalid multi-byte
-    # sequences and std::format throws std::format_error at runtime.
-    add_compile_options(/source-charset:utf-8 /execution-charset:windows-1252)
     # Statically link Microsoft's CRT.
     set(CMAKE_MSVC_RUNTIME_LIBRARY "MultiThreaded$<$<CONFIG:Debug>:Debug>")
 else()
     add_compile_options(-msse2)
-    add_compile_options(-finput-charset=UTF-8 -fexec-charset=WINDOWS-1252)
 endif()
 
 # Macros
@@ -81,6 +73,19 @@ macro(setup_debug_info target)
 endmacro()
 
 add_subdirectory(vendor)
+
+# Pin both charsets for Alpine Faction's own code. Sources are UTF-8; narrow string literals are Windows-1252,
+# because the .vf bitmap fonts are indexed by Windows-1252 byte value and several literals embed those bytes
+# directly (\x95 bullet, \xA6 chat prefix, ...). Without this the ordinary literal encoding follows the build
+# machine's system code page: on a DBCS locale such as 932 those bytes become invalid multi-byte sequences and
+# std::format throws std::format_error at runtime.
+# This is applied AFTER vendor/ so third-party code keeps its own charset settings.
+if(MSVC)
+    add_compile_options(/source-charset:utf-8 /execution-charset:windows-1252)
+else()
+    add_compile_options(-finput-charset=UTF-8 -fexec-charset=WINDOWS-1252)
+endif()
+
 add_subdirectory(launcher_common)
 add_subdirectory(launcher)
 add_subdirectory(common)