diff --git a/CHANGELOG.md b/CHANGELOG.md
index 264086a7..0bb370a4 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,6 +7,7 @@ TODO: SRFI 113
 Features:
 
 - Improve performance by inlining numeric arithmetic and comparison operations.
+- Revert `assq`, `assv`, `memq`, and `memv` back to primitives for improved performance.
 - Added support for SRFI 106: a basic socket interface, and SRFI 128: Comparators.
 - Improved library support to recognize all of the import set forms: `only`, `except`, `prefix`, and `rename`.
 - Allow explicit renaming macros to be declared interactively. This is the first limited support for calling `define-syntax` from `eval`. 
diff --git a/scheme/base.sld b/scheme/base.sld
index e7769a1b..9c732e48 100644
--- a/scheme/base.sld
+++ b/scheme/base.sld
@@ -10,11 +10,7 @@
   (import (scheme cyclone common))
   (export
     member
-    ;memv
-    ;memq
     assoc
-    ;assv
-    ;assq
     cons-source
     syntax-rules
     letrec*