diff --git a/src/clang_options_data.zig b/src/clang_options_data.zig
index d4320b1619..76e687c7d6 100644
--- a/src/clang_options_data.zig
+++ b/src/clang_options_data.zig
@@ -33,7 +33,14 @@ flagpd1("H"),
     .psl = false,
 },
 flagpd1("I-"),
-flagpd1("M"),
+.{
+    .name = "M",
+    .syntax = .flag,
+    .zig_equivalent = .dep_file_to_stdout,
+    .pd1 = true,
+    .pd2 = false,
+    .psl = false,
+},
 .{
     .name = "MD",
     .syntax = .flag,
@@ -53,7 +60,7 @@ flagpd1("M"),
 .{
     .name = "MM",
     .syntax = .flag,
-    .zig_equivalent = .dep_file_mm,
+    .zig_equivalent = .dep_file_to_stdout,
     .pd1 = true,
     .pd2 = false,
     .psl = false,
@@ -1983,7 +1990,7 @@ flagpsl("MT"),
 .{
     .name = "user-dependencies",
     .syntax = .flag,
-    .zig_equivalent = .dep_file_mm,
+    .zig_equivalent = .dep_file_to_stdout,
     .pd1 = false,
     .pd2 = true,
     .psl = false,
diff --git a/src/main.zig b/src/main.zig
index f192137b3c..0c6e4a63a3 100644
--- a/src/main.zig
+++ b/src/main.zig
@@ -1657,7 +1657,8 @@ fn buildOutputType(
                         disable_c_depfile = true;
                         try clang_argv.appendSlice(it.other_args);
                     },
-                    .dep_file_mm => { // -MM
+                    .dep_file_to_stdout => { // -M, -MM
+                        // "Like -MD, but also implies -E and writes to stdout by default"
                         // "Like -MMD, but also implies -E and writes to stdout by default"
                         c_out_mode = .preprocessor;
                         disable_c_depfile = true;
@@ -4652,7 +4653,7 @@ pub const ClangArgIterator = struct {
         lib_dir,
         mcpu,
         dep_file,
-        dep_file_mm,
+        dep_file_to_stdout,
         framework_dir,
         framework,
         nostdlibinc,
diff --git a/tools/update_clang_options.zig b/tools/update_clang_options.zig
index 2c13f1082b..d261b5ee33 100644
--- a/tools/update_clang_options.zig
+++ b/tools/update_clang_options.zig
@@ -386,11 +386,15 @@ const known_options = [_]KnownOpt{
     },
     .{
         .name = "MM",
-        .ident = "dep_file_mm",
+        .ident = "dep_file_to_stdout",
+    },
+    .{
+        .name = "M",
+        .ident = "dep_file_to_stdout",
     },
     .{
         .name = "user-dependencies",
-        .ident = "dep_file_mm",
+        .ident = "dep_file_to_stdout",
     },
     .{
         .name = "MMD",
@@ -497,7 +501,7 @@ const cpu_targets = struct {
     pub const riscv = std.Target.riscv;
     pub const sparc = std.Target.sparc;
     pub const spirv = std.Target.spirv;
-    pub const systemz = std.Target.systemz;
+    pub const s390x = std.Target.s390x;
     pub const ve = std.Target.ve;
     pub const wasm = std.Target.wasm;
     pub const x86 = std.Target.x86;
@@ -647,9 +651,9 @@ pub fn main() anyerror!void {
                 \\    .name = "{s}",
                 \\    .syntax = {s},
                 \\    .zig_equivalent = .{s},
-                \\    .pd1 = {s},
-                \\    .pd2 = {s},
-                \\    .psl = {s},
+                \\    .pd1 = {},
+                \\    .pd2 = {},
+                \\    .psl = {},
                 \\}},
                 \\
             , .{ name, final_syntax, ident, pd1, pd2, pslash });
@@ -677,9 +681,9 @@ pub fn main() anyerror!void {
                 \\    .name = "{s}",
                 \\    .syntax = {s},
                 \\    .zig_equivalent = .other,
-                \\    .pd1 = {s},
-                \\    .pd2 = {s},
-                \\    .psl = {s},
+                \\    .pd1 = {},
+                \\    .pd2 = {},
+                \\    .psl = {},
                 \\}},
                 \\
             , .{ name, syntax, pd1, pd2, pslash });