diff --git a/cc/config/global.go b/cc/config/global.go
index 248822f..3daee38 100644
--- a/cc/config/global.go
+++ b/cc/config/global.go
@@ -228,8 +228,6 @@
 		"-Wno-non-c-typedef-for-linkage", // http://b/161304145
 		// New warnings to be fixed after clang-r407598
 		"-Wno-string-concatenation", // http://b/175068488
-		// New warnings to be fixed after clang-r428724
-		"-Wno-align-mismatch", // http://b/193679946
 	}
 
 	// Extra cflags for external third-party projects to disable warnings that
@@ -268,8 +266,8 @@
 
 	// prebuilts/clang default settings.
 	ClangDefaultBase         = "prebuilts/clang/host"
-	ClangDefaultVersion      = "clang-r428724"
-	ClangDefaultShortVersion = "13.0.1"
+	ClangDefaultVersion      = "clang-r416183b1"
+	ClangDefaultShortVersion = "12.0.7"
 
 	// Directories with warnings from Android.bp files.
 	WarningAllowedProjects = []string{
diff --git a/cc/tidy.go b/cc/tidy.go
index fefa7f0..b2382e8 100644
--- a/cc/tidy.go
+++ b/cc/tidy.go
@@ -146,8 +146,6 @@
 	tidyChecks = tidyChecks + ",-bugprone-signed-char-misuse"
 	// http://b/155034972
 	tidyChecks = tidyChecks + ",-bugprone-branch-clone"
-	// http://b/193716442
-	tidyChecks = tidyChecks + ",-bugprone-implicit-widening-of-multiplication-result"
 	flags.TidyFlags = append(flags.TidyFlags, tidyChecks)
 
 	if ctx.Config().IsEnvTrue("WITH_TIDY") {