diff --git a/include/patomic/types/ops/transaction.h b/include/patomic/types/ops/transaction.h
index 6152e5b3b..7201074f8 100644
--- a/include/patomic/types/ops/transaction.h
+++ b/include/patomic/types/ops/transaction.h
@@ -5,7 +5,9 @@
 
 #include <stddef.h>
 
-// TODO: extern "C"
+#ifdef __cplusplus
+extern "C" {
+#endif
 
 
 /**
@@ -1070,4 +1072,8 @@ typedef struct {
 } patomic_ops_transaction_t;
 
 
+#ifdef __cplusplus
+}  /* extern "C" */
+#endif
+
 #endif  /* PATOMIC_OPS_TRANSACTION_H */