diff --git a/CMakeLists.txt b/CMakeLists.txt
index f24f3f91..42279acf 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -186,8 +186,7 @@ endfunction()
 
 # Define the fmt library, its includes and the needed defines.
 add_headers(FMT_HEADERS args.h chrono.h color.h compile.h core.h format.h
-                        format-inl.h locale.h os.h ostream.h posix.h printf.h
-                        ranges.h)
+                        format-inl.h locale.h os.h ostream.h printf.h ranges.h)
 if (FMT_OS)
   set(FMT_SOURCES src/format.cc src/os.cc)
 else()
diff --git a/include/fmt/posix.h b/include/fmt/posix.h
deleted file mode 100644
index da19e9d5..00000000
--- a/include/fmt/posix.h
+++ /dev/null
@@ -1,2 +0,0 @@
-#include "os.h"
-#warning "fmt/posix.h is deprecated; use fmt/os.h instead"