diff --git a/pep-0426.txt b/pep-0426.txt
index aaec92bb1..745c8757c 100644
--- a/pep-0426.txt
+++ b/pep-0426.txt
@@ -1259,6 +1259,11 @@ back on attempting to install from source rather than failing entirely.
 Extras (optional dependencies)
 ==============================
 
+.. note::
+
+   The general definition of extras has been moved out to the
+   specification for dependency declarations: PEP 508.
+
 Extras are additional dependencies that enable an optional aspect
 of the distribution, often corresponding to a ``try: import
 optional_dependency ...`` block in the code.  To support the use of the
@@ -1365,9 +1370,8 @@ Environment markers
 
 .. note::
 
-   The definition of environment markers is in the process of being moved out
-   to a dedicated specification: PEP 496.
-
+   The definition of environment markers has been moved out to the
+   specification for dependency declarations: PEP 508.
 
 An **environment marker** describes a condition about the current execution
 environment. They are used to indicate when certain dependencies are only