diff --git a/src/ast.scm b/src/ast.scm
index 997135da7d042..5df41a117b8b3 100644
--- a/src/ast.scm
+++ b/src/ast.scm
@@ -406,15 +406,17 @@
   e)
 
 (define (vararg? x) (and (pair? x) (eq? (car x) '...)))
-(define (varargexpr? x) (and
-                         (pair? x)
-                         (eq? (car x) '::)
-                         (or
-                          (eq? (caddr x) 'Vararg)
-                          (and
-                           (pair? (caddr x))
-                           (length> (caddr x) 1)
-                           (eq? (cadr (caddr x)) 'Vararg)))))
+(define (vararg-type-expr? x)
+  (or (eq? x 'Vararg)
+      (and (length> x 1)
+           (or (and (eq? (car x) 'curly)
+                    (vararg-type-expr? (cadr x)))
+               (and (eq? (car x) 'where)
+                    (vararg-type-expr? (cadr x)))))))
+(define (varargexpr? x)
+  (and (pair? x)
+       (eq? (car x) '::)
+       (vararg-type-expr? (caddr x))))
 (define (linenum? x) (and (pair? x) (eq? (car x) 'line)))
 
 (define (make-assignment l r) `(= ,l ,r))
diff --git a/test/syntax.jl b/test/syntax.jl
index b8f7c6ce1c5e4..f649cccc7548b 100644
--- a/test/syntax.jl
+++ b/test/syntax.jl
@@ -1965,3 +1965,7 @@ end
 let a(; b) = b
     @test a(b=3) == 3
 end
+
+# issue #33987
+f33987(args::(Vararg{Any, N} where N); kwargs...) = args
+@test f33987(1,2,3) === (1,2,3)