diff --git a/build-aux/speedo.mk b/build-aux/speedo.mk
index fb1c23b4f..7ade2c726 100644
--- a/build-aux/speedo.mk
+++ b/build-aux/speedo.mk
@@ -1430,7 +1430,7 @@ define AUTHENTICODE_sign
      echo "speedo: Signing via host $(AUTHENTICODE_SIGNHOST)";\
      scp $(1) "$(AUTHENTICODE_SIGNHOST):a.exe" ;\
      ssh "$(AUTHENTICODE_SIGNHOST)" '$(AUTHENTICODE_TOOL)' sign \
-        /n '"g10 Code GmbH"' \
+        /a /n '"g10 Code GmbH"' \
         /tr 'http://rfc3161timestamp.globalsign.com/advanced' /td sha256 \
         /fd sha256 /du https://gnupg.org a.exe ;\
      scp "$(AUTHENTICODE_SIGNHOST):a.exe" $(2);\