diff --git a/collects/compiler/embed-sig.ss b/collects/compiler/embed-sig.ss
index 16c593fe79..d6fd69d078 100644
--- a/collects/compiler/embed-sig.ss
+++ b/collects/compiler/embed-sig.ss
@@ -7,4 +7,5 @@
     (make-embedding-executable
      write-module-bundle
      embedding-executable-is-directory?
-     embedding-executable-put-file-extension+style+filters)))
+     embedding-executable-put-file-extension+style+filters
+     embedding-executable-add-suffix)))
diff --git a/collects/launcher/launcher-sig.ss b/collects/launcher/launcher-sig.ss
index b126afe7c2..bd643a46bf 100644
--- a/collects/launcher/launcher-sig.ss
+++ b/collects/launcher/launcher-sig.ss
@@ -23,6 +23,9 @@
      mred-launcher-is-directory?
      mzscheme-launcher-is-directory?
 
+     mred-launcher-add-suffix
+     mzscheme-launcher-add-suffix
+
      mred-launcher-put-file-extension+style+filters
      mzscheme-launcher-put-file-extension+style+filters