Index: clang/lib/Format/Format.cpp
===================================================================
--- clang/lib/Format/Format.cpp
+++ clang/lib/Format/Format.cpp
@@ -722,23 +722,23 @@
                         FormatStyle::TrailingCommentsAlignmentStyle &Value) {
     IO.enumCase(Value, "Leave",
                 FormatStyle::TrailingCommentsAlignmentStyle(
-                    {FormatStyle::TCAS_Leave, 1}));
+                    {FormatStyle::TCAS_Leave, 0}));
 
     IO.enumCase(Value, "Always",
                 FormatStyle::TrailingCommentsAlignmentStyle(
-                    {FormatStyle::TCAS_Always, 1}));
+                    {FormatStyle::TCAS_Always, 0}));
 
     IO.enumCase(Value, "Never",
                 FormatStyle::TrailingCommentsAlignmentStyle(
-                    {FormatStyle::TCAS_Never, 1}));
+                    {FormatStyle::TCAS_Never, 0}));
 
     // For backwards compatibility
     IO.enumCase(Value, "true",
                 FormatStyle::TrailingCommentsAlignmentStyle(
-                    {FormatStyle::TCAS_Always, 1}));
+                    {FormatStyle::TCAS_Always, 0}));
     IO.enumCase(Value, "false",
                 FormatStyle::TrailingCommentsAlignmentStyle(
-                    {FormatStyle::TCAS_Never, 1}));
+                    {FormatStyle::TCAS_Never, 0}));
   }
 
   static void mapping(IO &IO,
Index: clang/unittests/Format/ConfigParseTest.cpp
===================================================================
--- clang/unittests/Format/ConfigParseTest.cpp
+++ clang/unittests/Format/ConfigParseTest.cpp
@@ -472,20 +472,20 @@
 
   CHECK_PARSE("AlignTrailingComments: Leave", AlignTrailingComments,
               FormatStyle::TrailingCommentsAlignmentStyle(
-                  {FormatStyle::TCAS_Leave, 1}));
+                  {FormatStyle::TCAS_Leave, 0}));
   CHECK_PARSE("AlignTrailingComments: Always", AlignTrailingComments,
               FormatStyle::TrailingCommentsAlignmentStyle(
-                  {FormatStyle::TCAS_Always, 1}));
+                  {FormatStyle::TCAS_Always, 0}));
   CHECK_PARSE("AlignTrailingComments: Never", AlignTrailingComments,
               FormatStyle::TrailingCommentsAlignmentStyle(
-                  {FormatStyle::TCAS_Never, 1}));
+                  {FormatStyle::TCAS_Never, 0}));
   // For backwards compatibility
   CHECK_PARSE("AlignTrailingComments: true", AlignTrailingComments,
               FormatStyle::TrailingCommentsAlignmentStyle(
-                  {FormatStyle::TCAS_Always, 1}));
+                  {FormatStyle::TCAS_Always, 0}));
   CHECK_PARSE("AlignTrailingComments: false", AlignTrailingComments,
               FormatStyle::TrailingCommentsAlignmentStyle(
-                  {FormatStyle::TCAS_Never, 1}));
+                  {FormatStyle::TCAS_Never, 0}));
   CHECK_PARSE_NESTED_VALUE("Kind: Always", AlignTrailingComments, Kind,
                            FormatStyle::TCAS_Always);
   CHECK_PARSE_NESTED_VALUE("Kind: Never", AlignTrailingComments, Kind,