diff --git a/src/google/protobuf/compiler/rust/naming.cc b/src/google/protobuf/compiler/rust/naming.cc
index e0a492f78e..5ba918c485 100644
--- a/src/google/protobuf/compiler/rust/naming.cc
+++ b/src/google/protobuf/compiler/rust/naming.cc
@@ -62,7 +62,9 @@ std::string GetThunkCcFile(Context& ctx, const FileDescriptor& file) {
 
 std::string GetHeaderFile(Context& ctx, const FileDescriptor& file) {
   auto basename = StripProto(file.name());
-  return absl::StrCat(basename, ".proto.h");
+  constexpr absl::string_view kCcGencodeExt = ".pb.h";
+
+  return absl::StrCat(basename, kCcGencodeExt);
 }
 
 std::string RawMapThunk(Context& ctx, const Descriptor& msg,