diff --git a/src/macroexpand.scm b/src/macroexpand.scm
index 77d0fbb1781ae..3ed334b2f4d27 100644
--- a/src/macroexpand.scm
+++ b/src/macroexpand.scm
@@ -419,7 +419,7 @@
                   (map (lambda (x)
                          (if (assignment? x)
                              `(= ,(unescape (cadr x))
-                                 ,(resolve-expansion-vars-with-new-env x env m parent-scope inarg))
+                                 ,(resolve-expansion-vars-with-new-env (caddr x) env m parent-scope inarg))
                              (resolve-expansion-vars-with-new-env x env m parent-scope inarg)))
                        (cdr e))))
 
@@ -496,10 +496,17 @@
         ((and (eq? (car e) '=) (not (function-def? e)))
          (append! (filter symbol? (decl-vars* (cadr e)))
                   (find-assigned-vars-in-expansion (caddr e) #f)))
+        ((eq? (car e) 'tuple)
+         (apply append! (map (lambda (x)
+                               (find-assigned-vars-in-expansion (if (assignment? x)
+                                                                    (caddr x)
+                                                                    x)
+                                                                #f))
+                             (cdr e))))
         (else
          (apply append! (map (lambda (x)
                                (find-assigned-vars-in-expansion x #f))
-                             e)))))
+                             (cdr e))))))
 
 (define (keywords-introduced-by e)
   (let ((v (pattern-expand1 keywords-introduced-by-patterns e)))
diff --git a/test/syntax.jl b/test/syntax.jl
index 3b9f516157bdd..bc8b74df94ef5 100644
--- a/test/syntax.jl
+++ b/test/syntax.jl
@@ -1850,6 +1850,9 @@ macro id28992(x) x end
 
 # issue #32121
 @test @id28992((a=1, b=2)) === (a=1, b=2)
+a32121 = 8
+b32121 = 9
+@test @id28992((a32121=a32121, b32121=b32121)) === (a32121=8, b32121=9)
 
 # issue #31596
 f31596(x; kw...) = x