diff --git a/proposals/1730-cs-api-in-login-response.md b/proposals/1730-cs-api-in-login-response.md
index 0043ce26..b5e04215 100644
--- a/proposals/1730-cs-api-in-login-response.md
+++ b/proposals/1730-cs-api-in-login-response.md
@@ -50,7 +50,7 @@ homeserver after login.
 
 A complete login flow is as shown in the following sequence diagram:
 
-![Sequence diagram](images/1730-seq-diagram.svg)
+![Sequence diagram](images/1730-seq-diagram.1.svg)
 
 Note that this flow is complicated by the out-of-band SAML2 authentication. We
 envisage that a similar technique could also be used for a standard
diff --git a/proposals/images/1730-seq-diagram.svg b/proposals/images/1730-seq-diagram.1.svg
similarity index 100%
rename from proposals/images/1730-seq-diagram.svg
rename to proposals/images/1730-seq-diagram.1.svg