diff --git a/base_cpp/include/embb/base/mutex.h b/base_cpp/include/embb/base/mutex.h
index 61ca2f5..b1461ca 100644
--- a/base_cpp/include/embb/base/mutex.h
+++ b/base_cpp/include/embb/base/mutex.h
@@ -42,7 +42,7 @@ namespace base {
  */
 
 /**
- * Pre-declaration for friending.
+ * Forward declaration for friending.
  */
 class ConditionVariable;
 
diff --git a/base_cpp/include/embb/base/thread_specific_storage.h b/base_cpp/include/embb/base/thread_specific_storage.h
index 812fe42..cb3a421 100644
--- a/base_cpp/include/embb/base/thread_specific_storage.h
+++ b/base_cpp/include/embb/base/thread_specific_storage.h
@@ -36,7 +36,7 @@ namespace base {
 
 namespace test {
   /**
-   * Pre-declaration for friending.
+   * Forward declaration for friending.
    */
   class ThreadSpecificStorageTest;
 }