diff --git a/src/ikarus.apply.ss b/src/ikarus.apply.ss
new file mode 100644
index 0000000..435b891
--- /dev/null
+++ b/src/ikarus.apply.ss
@@ -0,0 +1,39 @@
+
+(library (ikarus apply)
+  (export apply)
+  (import 
+    (except (ikarus) apply)
+    (only (scheme) $$apply $car $cdr $set-cdr!))
+
+  (define apply
+    (let ()
+      (define (err f ls)
+        (if (procedure? f)
+            (error 'apply "not a list")
+            (error 'apply "~s is not a procedure" f)))
+      (define (fixandgo f a0 a1 ls p d)
+        (cond
+          [(null? ($cdr d))
+           (let ([last ($car d)])
+             ($set-cdr! p last)
+             (if (and (procedure? f) (list? last))
+                 ($$apply f a0 a1 ls)
+                 (err f last)))]
+          [else (fixandgo f a0 a1 ls d ($cdr d))]))
+      (define apply
+        (case-lambda
+          [(f ls) 
+           (if (and (procedure? f) (list? ls))
+               ($$apply f ls)
+               (err f ls))]
+          [(f a0 ls)
+           (if (and (procedure? f) (list? ls))
+               ($$apply f a0 ls)
+               (err f ls))]
+          [(f a0 a1 ls)
+           (if (and (procedure? f) (list? ls))
+               ($$apply f a0 a1 ls)
+               (err f ls))]
+          [(f a0 a1 . ls)
+           (fixandgo f a0 a1 ls ls ($cdr ls))]))
+      apply)))
diff --git a/src/ikarus.boot b/src/ikarus.boot
index 7ed8046..6aba592 100644
Binary files a/src/ikarus.boot and b/src/ikarus.boot differ
diff --git a/src/ikarus.core.ss b/src/ikarus.core.ss
index 53f719b..6e9c031 100644
--- a/src/ikarus.core.ss
+++ b/src/ikarus.core.ss
@@ -15,38 +15,6 @@
   (lambda () (eof-object)))
 
   
-(primitive-set! 'apply
-  (let ()
-    (define (err f ls)
-      (if (procedure? f)
-          (error 'apply "not a list")
-          (error 'apply "~s is not a procedure" f)))
-    (define (fixandgo f a0 a1 ls p d)
-      (cond
-        [(null? ($cdr d))
-         (let ([last ($car d)])
-           ($set-cdr! p last)
-           (if (and (procedure? f) (list? last))
-               ($$apply f a0 a1 ls)
-               (err f last)))]
-        [else (fixandgo f a0 a1 ls d ($cdr d))]))
-    (define apply
-      (case-lambda
-        [(f ls) 
-         (if (and (procedure? f) (list? ls))
-             ($$apply f ls)
-             (err f ls))]
-        [(f a0 ls)
-         (if (and (procedure? f) (list? ls))
-             ($$apply f a0 ls)
-             (err f ls))]
-        [(f a0 a1 ls)
-         (if (and (procedure? f) (list? ls))
-             ($$apply f a0 a1 ls)
-             (err f ls))]
-        [(f a0 a1 . ls)
-         (fixandgo f a0 a1 ls ls ($cdr ls))]))
-    apply))
   
 
 
diff --git a/src/makefile.ss b/src/makefile.ss
index 183a666..313918a 100755
--- a/src/makefile.ss
+++ b/src/makefile.ss
@@ -26,6 +26,7 @@
       "ikarus.control.ss"
       "ikarus.collect.ss"
       "ikarus.void.ss"
+      "ikarus.apply.ss"
       "ikarus.predicates.ss"
       "ikarus.pairs.ss"
       "ikarus.lists.ss"