diff --git a/collects/racket/private/serialize.rkt b/collects/racket/private/serialize.rkt
index 1bf15d697d..e6a68d1ed1 100644
--- a/collects/racket/private/serialize.rkt
+++ b/collects/racket/private/serialize.rkt
@@ -2,6 +2,8 @@
   (require syntax/modcollapse
            unstable/struct
            racket/list
+           racket/flonum
+           racket/fixnum
            "serialize-structs.rkt")
 
   ;; This module implements the core serializer. The syntactic
@@ -43,6 +45,8 @@
 	(path-for-some-system? v)
 	(bytes? v)
 	(vector? v)
+	(flvector? v)
+	(fxvector? v)
 	(pair? v)
 	(mpair? v)
 	(hash? v)
@@ -137,6 +141,8 @@
 		 (hash? o))
 	     (not (immutable? o)))
 	(serializable-struct? o)
+        (flvector? o)
+        (fxvector? o)
         (let ([k (prefab-struct-key o)])
           (and k
                ;; Check whether all fields are mutable:
@@ -226,6 +232,8 @@
 	    (void)]
 	   [(vector? v)
 	    (for-each loop (vector->list v))]
+           [(flvector? v) (void)] 
+           [(fxvector? v) (void)] 
 	   [(pair? v)
 	    (loop (car v)) 
 	    (loop (cdr v))]
@@ -313,6 +321,10 @@
                  (andmap quotable? elems))
             (cons 'q v)
             (cons (if (immutable? v) 'v 'v!) elems))]
+       [(flvector? v)
+        (cons 'vl (for/list ([i (in-flvector v)]) i))]
+       [(fxvector? v)
+        (cons 'vx (for/list ([i (in-fxvector v)]) i))]
        [(pair? v)
 	(let ([loop (serial #t)])
           (let ([a (loop (car v))]
@@ -493,6 +505,8 @@
 	  [(m) (mcons (loop (cadr v)) (loop (cddr v)))]
 	  [(v) (apply vector-immutable (map loop (cdr v)))]
 	  [(v!) (list->vector (map loop (cdr v)))]
+          [(vl) (apply flvector (map loop (cdr v)))]
+          [(vx) (apply fxvector (map loop (cdr v)))]
 	  [(b) (box-immutable (loop (cdr v)))]
 	  [(b!) (box (loop (cdr v)))]
 	  [(h) (let ([al (map (lambda (p)
diff --git a/collects/scribblings/reference/serialization.scrbl b/collects/scribblings/reference/serialization.scrbl
index 19eb014a33..ba8e4c006f 100644
--- a/collects/scribblings/reference/serialization.scrbl
+++ b/collects/scribblings/reference/serialization.scrbl
@@ -45,7 +45,8 @@ The following kinds of values are serializable:
        @tech{unreadable symbols}, @tech{strings}, @tech{byte strings}, @tech{paths} (for a
        specific convention), @|void-const|, and the empty list;}
 
- @item{@tech{pairs}, @tech{mutable pairs}, @tech{vectors}, @tech{box}es, @tech{hash tables}, and @tech{sets};}
+ @item{@tech{pairs}, @tech{mutable pairs}, @tech{vectors}, @tech{flvectors}, @tech{fxvectors},
+       @tech{box}es, @tech{hash tables}, and @tech{sets};}
 
  @item{@racket[date], @racket[date*], and @racket[arity-at-least] structures; and}
  
@@ -264,6 +265,14 @@ elements:
                   @racket[cdr] is a list of serials; it represents a
                   mutable vector.}
 
+            @item{a pair whose @racket[car] is @racket['vl] and whose
+                  @racket[cdr] is a list of serials; it represents a
+                  @tech{flvector}.}
+
+            @item{a pair whose @racket[car] is @racket['vx] and whose
+                  @racket[cdr] is a list of serials; it represents a
+                  @tech{fxvector}.}
+
             @item{a pair whose @racket[car] is @racket['b] and whose
                   @racket[cdr] is a serial; it represents an immutable
                   box.}
diff --git a/collects/tests/racket/serialize.rktl b/collects/tests/racket/serialize.rktl
index 3d86de6097..a25f322a2e 100644
--- a/collects/tests/racket/serialize.rktl
+++ b/collects/tests/racket/serialize.rktl
@@ -4,7 +4,9 @@
 (Section 'serialization)
 
 (require racket/serialize
-         racket/file)
+         racket/file
+         racket/flonum
+         racket/fixnum)
 
 ;; ----------------------------------------
 
@@ -136,6 +138,8 @@
 (test-ser (mk-ht make-weak-hash))
 (test-ser #s(a 0 1 2))
 (test-ser #s((a q 2) 0 1 2))
+(test-ser (fxvector 1 2 30))
+(test-ser (flvector 0.1 2.0 30e3))
 
 (test-ser (set 'set 0 1 2))
 (test-ser (seteqv 'seteqv 0 1 2))
diff --git a/doc/release-notes/racket/HISTORY.txt b/doc/release-notes/racket/HISTORY.txt
index 0aa42294a2..57fa1e1b46 100644
--- a/doc/release-notes/racket/HISTORY.txt
+++ b/doc/release-notes/racket/HISTORY.txt
@@ -3,6 +3,7 @@ Changed case to use equal? instead of eqv?
 r5rs, r6rs: fixed case and cond to disallow internal definitions
  in clauses
 Add #fx() and #fl() reader forms for flvectors and fxvectors
+racket/serialize: fxvectors and flvectors are serializable
 
 Version 5.3.1.8
 file/untar: added