diff --git a/include/fmt/posix.h b/include/fmt/posix.h
index a3e0ec22bccf..1be9a87ec5da 100644
--- a/include/fmt/posix.h
+++ b/include/fmt/posix.h
@@ -353,7 +353,7 @@ class File {
 long getpagesize();
 
 #if (defined(LC_NUMERIC_MASK) || defined(_MSC_VER)) && \
-    !defined(__ANDROID__) && !defined(__CYGWIN__)
+    !defined(__ANDROID__) && !defined(__CYGWIN__) && !defined(__OpenBSD__)
 # define FMT_LOCALE
 #endif