diff --git a/doc/doxygen.conf b/doc/doxygen.conf
index 4d604f4e9..80c776502 100644
--- a/doc/doxygen.conf
+++ b/doc/doxygen.conf
@@ -2299,6 +2299,7 @@ EXPAND_AS_DEFINED      = ATTRIBUTE_ACCESSOR_DEFINE \
                          ATTRIBUTE_VALUE_IMPLEMENT_WITH_NAME \
                          NS_UNUSED_GLOBAL \
                          NS_DEPRECATED \
+                         NS_DEPRECATED_3_43 \
                          NS_DEPRECATED_3_42 \
                          NS_DEPRECATED_3_41 \
                          NS_DEPRECATED_3_40
diff --git a/src/core/model/deprecated.h b/src/core/model/deprecated.h
index 4166d84e7..6a94bbb71 100644
--- a/src/core/model/deprecated.h
+++ b/src/core/model/deprecated.h
@@ -94,6 +94,13 @@
  */
 #define NS_DEPRECATED(msg) [[deprecated(msg)]]
 
+/**
+ * \ingroup deprecation
+ * \def NS_DEPRECATED_3_43
+ * Tag for things deprecated in version ns-3.43.
+ */
+#define NS_DEPRECATED_3_43(msg) NS_DEPRECATED("Deprecated in ns-3.43: " msg)
+
 /**
  * \ingroup deprecation
  * \def NS_DEPRECATED_3_42