diff --git a/include/spdlog/common.h b/include/spdlog/common.h
index 2bd4e5d8..53b001a1 100644
--- a/include/spdlog/common.h
+++ b/include/spdlog/common.h
@@ -64,6 +64,9 @@
 #if !defined(SPDLOG_USE_STD_FORMAT) && FMT_VERSION >= 80000 // backward compatibility with fmt versions older than 8
 #    define SPDLOG_FMT_RUNTIME(format_string) fmt::runtime(format_string)
 #    define SPDLOG_FMT_STRING(format_string) FMT_STRING(format_string)
+#    if defined(SPDLOG_WCHAR_FILENAMES)
+#        include <spdlog/fmt/xchar.h>
+#    endif
 #else
 #    define SPDLOG_FMT_RUNTIME(format_string) format_string
 #    define SPDLOG_FMT_STRING(format_string) format_string