diff --git a/libcorpus2/sentence.h b/libcorpus2/sentence.h
index ee572d9ea669f24b0f522f642c423bb8e4c782cd..5c465e417c398c9f3d6239402d6b4b1fb631b7ea 100644
--- a/libcorpus2/sentence.h
+++ b/libcorpus2/sentence.h
@@ -113,6 +113,11 @@ public:
 		return tokens_[0];
 	}
 
+	/// Identifier getter
+	const std::string id() const {
+		return id_;
+	}
+
 protected:
 	/// The tokens this sentence contains and owns
 	std::vector<Token*> tokens_;