diff --git a/racket/src/expander/compile/extra-inspector.rkt b/racket/src/expander/compile/extra-inspector.rkt
index ac5fff3ce9..fa80527d2d 100644
--- a/racket/src/expander/compile/extra-inspector.rkt
+++ b/racket/src/expander/compile/extra-inspector.rkt
@@ -131,12 +131,16 @@
 
 ;; Merge inspectors from potentially different paths through imported linklets
 (define (module-use-merge-extra-inspectorss! existing-mu* mu*)
-  (define extra-inspectorss (module-use*-extra-inspectorss mu*))
   (define existing-extra-inspectorss (module-use*-extra-inspectorss existing-mu*))
+  (define extra-inspectorss (module-use*-extra-inspectorss mu*))
   (define new-extra-inspectorss
-    (for/fold ([new-extra-inspectorss existing-extra-inspectorss]) ([(sym extra-inspectors) (in-hash extra-inspectorss)])
-      (hash-set new-extra-inspectorss
-                sym
-                (extra-inspectors-merge extra-inspectors
-                                        (hash-ref new-extra-inspectorss sym (seteq))))))
+    (cond
+      [(not existing-extra-inspectorss) extra-inspectorss]
+      [(not extra-inspectorss) existing-extra-inspectorss]
+      [else
+       (for/fold ([new-extra-inspectorss existing-extra-inspectorss]) ([(sym extra-inspectors) (in-hash extra-inspectorss)])
+         (hash-set new-extra-inspectorss
+                   sym
+                   (extra-inspectors-merge extra-inspectors
+                                           (hash-ref new-extra-inspectorss sym (seteq)))))]))
   (set-module-use*-extra-inspectorss! existing-mu* new-extra-inspectorss))
diff --git a/racket/src/racket/src/startup.inc b/racket/src/racket/src/startup.inc
index 82f5a49331..a70e7352fa 100644
--- a/racket/src/racket/src/startup.inc
+++ b/racket/src/racket/src/startup.inc
@@ -31318,9 +31318,14 @@ static const char *startup_source =
 "(module-use-merge-extra-inspectorss!)"
 "(lambda(existing-mu*_0 mu*_0)"
 "(begin"
-"(let-values(((extra-inspectorss_0)(module-use*-extra-inspectorss mu*_0)))"
 "(let-values(((existing-extra-inspectorss_0)(module-use*-extra-inspectorss existing-mu*_0)))"
+"(let-values(((extra-inspectorss_0)(module-use*-extra-inspectorss mu*_0)))"
 "(let-values(((new-extra-inspectorss_0)"
+"(if(not existing-extra-inspectorss_0)"
+"(let-values() extra-inspectorss_0)"
+"(if(not extra-inspectorss_0)"
+"(let-values() existing-extra-inspectorss_0)"
+"(let-values()"
 "(let-values(((ht_0) extra-inspectorss_0))"
 "(begin"
 "(if(variable-reference-from-unsafe?(#%variable-reference))"
@@ -31356,7 +31361,7 @@ static const char *startup_source =
 " new-extra-inspectorss_0)))))"
 " for-loop_0)"
 " existing-extra-inspectorss_0"
-"(hash-iterate-first ht_0))))))"
+"(hash-iterate-first ht_0)))))))))"
 "(set-module-use*-extra-inspectorss! existing-mu*_0 new-extra-inspectorss_0)))))))"
 "(define-values"
 "(struct:link-info"