diff --git a/Meta/CMake/serenity_compile_options.cmake b/Meta/CMake/serenity_compile_options.cmake
index ecb5ef132f..e43597012f 100644
--- a/Meta/CMake/serenity_compile_options.cmake
+++ b/Meta/CMake/serenity_compile_options.cmake
@@ -20,6 +20,7 @@ add_compile_options(-Wwrite-strings)
 add_compile_options(-fno-delete-null-pointer-checks)
 add_compile_options(-ffile-prefix-map=${SerenityOS_SOURCE_DIR}=.)
 add_compile_options(-fno-omit-frame-pointer)
+add_compile_options(-fsigned-char)
 add_compile_options(-fsized-deallocation)
 add_compile_options(-fstack-clash-protection)
 add_compile_options(-fstack-protector-strong)