diff --git a/libcxx/include/module.modulemap b/libcxx/include/module.modulemap
index 25abdb0731adc1..eb7dae706e22af 100644
--- a/libcxx/include/module.modulemap
+++ b/libcxx/include/module.modulemap
@@ -937,22 +937,22 @@ module std [system] {
   module __availability      { private header "__availability"      export * }
   module __bit_reference     { private header "__bit_reference"     export * }
   module __bits              { private header "__bits"              export * }
-  module __debug             { header "__debug"             export * }
+  module __debug             {         header "__debug"             export * }
   module __errc              { private header "__errc"              export * }
   module __function_like     { private header "__function_like.h"   export * }
-  module __hash_table        { header "__hash_table"        export * }
+  module __hash_table        {         header "__hash_table"        export * }
   module __locale            { private header "__locale"            export * }
   module __mbstate           { private header "__mbstate_t.h"       export * }
   module __mutex_base        { private header "__mutex_base"        export * }
   module __node_handle       { private header "__node_handle"       export * }
-  module __nullptr           { header "__nullptr"           export * }
+  module __nullptr           {         header "__nullptr"           export * }
   module __split_buffer      { private header "__split_buffer"      export * }
   module __std_stream        { private header "__std_stream"        export * }
   module __string            { private header "__string"            export * }
-  module __threading_support { header "__threading_support" export * }
-  module __tree              { header "__tree"              export * }
+  module __threading_support {         header "__threading_support" export * }
+  module __tree              {         header "__tree"              export * }
   module __tuple             { private header "__tuple"             export * }
-  module __undef_macros      { header "__undef_macros"      export * }
+  module __undef_macros      {         header "__undef_macros"      export * }
 
   module experimental {
     requires cplusplus11