diff --git a/thirdparty/fmt/CMakeLists.txt b/thirdparty/fmt/CMakeLists.txt
index f926d89eb..f9705db3b 100644
--- a/thirdparty/fmt/CMakeLists.txt
+++ b/thirdparty/fmt/CMakeLists.txt
@@ -6,4 +6,5 @@ add_library(fmt INTERFACE)
 target_include_directories(fmt INTERFACE "${CMAKE_CURRENT_SOURCE_DIR}/include")
 target_compile_features(fmt INTERFACE cxx_std_11)
 target_compile_definitions(fmt INTERFACE -DFMT_HEADER_ONLY)
+target_compile_definitions(fmt INTERFACE "-DFMT_UNICODE=0")
 add_library(fmt::fmt-header-only ALIAS fmt)