diff --git a/toolchain/check/cpp/generate_ast.cpp b/toolchain/check/cpp/generate_ast.cpp
index 1ba626c68344..ef7ad1146358 100644
--- a/toolchain/check/cpp/generate_ast.cpp
+++ b/toolchain/check/cpp/generate_ast.cpp
@@ -335,7 +335,7 @@ class ShallowCopyCompilerInvocation : public clang::CompilerInvocation {
   }
 };
 
-// Provides clang ASTs representing Carbon SemIR entities.
+// Provides clang AST nodes representing Carbon SemIR entities.
 class CarbonExternalASTSource : public clang::ExternalASTSource {
  public:
   explicit CarbonExternalASTSource(Context* context,