diff --git a/base/compiler_specific.h b/base/compiler_specific.h
index 6693e9ea33e9..d3b425abe9ca 100644
--- a/base/compiler_specific.h
+++ b/base/compiler_specific.h
@@ -340,7 +340,8 @@ inline constexpr bool AnalyzerAssumeTrue(bool arg) {
 #endif  // defined(__clang_analyzer__)
 
 // Use nomerge attribute to disable optimization of merging multiple same calls.
-#if defined(__clang__) && __has_attribute(nomerge)
+#if defined(__clang__) && (__clang_major__ >= 12) && \
+    __has_attribute(nomerge) && !defined(OS_CHROMEOS)
 #define NOMERGE [[clang::nomerge]]
 #else
 #define NOMERGE