diff --git a/scheme/cyclone/primitives.sld b/scheme/cyclone/primitives.sld
index 69ad3928..ac639960 100644
--- a/scheme/cyclone/primitives.sld
+++ b/scheme/cyclone/primitives.sld
@@ -912,6 +912,11 @@
          prim-call)))
 
   ;; Map from a Scheme function to a primitive, if possible.
+  ;;
+  ;; Inputs:
+  ;; - Function symbol
+  ;; - Number of arguments to the function
+  ;;
   ;; Note the only reason to do this is to change from a CPS-style
   ;; function to one that can be inlined with no CPS, which yields
   ;; a significant speed improvement.
diff --git a/scheme/cyclone/transforms.sld b/scheme/cyclone/transforms.sld
index 65b32f7a..3f11e6f5 100644
--- a/scheme/cyclone/transforms.sld
+++ b/scheme/cyclone/transforms.sld
@@ -1194,24 +1194,6 @@
 ;; are renamed and if expressions always have an else clause.
 ;;
 (define (prim-convert expr)
-  ;; Map from a given function call to a primitive call, if possible
-  ;; Inputs:
-  ;; - Function symbol
-  ;; - Number of arguments to the function
-  (define (func->prim/exact-args func-sym num-args)
-    (define mappings
-      '(
-         (char=?  2 Cyc-fast-char-eq )
-         (char>?  2 Cyc-fast-char-gt )
-         (char<?  2 Cyc-fast-char-lt )
-         (char>=? 2 Cyc-fast-char-gte)
-         (char<=? 2 Cyc-fast-char-lte)
-       ))
-    (let ((m (assoc func-sym mappings)))
-      ;(trace:error `(func->prim/exact-args ,func-sym ,num-args ,m))
-      (cond
-        ((and m (= (cadr m) num-args)) (caddr m)) ;; Upgrade to a primitive
-        (else func-sym)))) ;; Remain a function
   (define (conv ast)
     (cond
       ((const? ast) ast)
@@ -1240,7 +1222,7 @@
       ((app? ast)
        (cond
         ((ref? (car ast))
-         `( ,(func->prim/exact-args (car ast) (- (length ast) 1))
+         `( ,(prim:func->prim (car ast) (- (length ast) 1))
             ,@(cdr ast)))
         (else
          (map conv ast))))