diff --git a/ports/libsimpleservo/api/Cargo.toml b/ports/libsimpleservo/api/Cargo.toml
index 0dd05e38561..5f9f7a6a5ed 100644
--- a/ports/libsimpleservo/api/Cargo.toml
+++ b/ports/libsimpleservo/api/Cargo.toml
@@ -53,3 +53,4 @@ refcell_backtrace = ["libservo/refcell_backtrace"]
 webdriver = ["libservo/webdriver"]
 uwp = ["libservo/uwp", "webxr/openxr-api"]
 webgl_backtrace = ["libservo/webgl_backtrace"]
+vslatestinstalled = ["libservo/vslatestinstalled"]
diff --git a/ports/libsimpleservo/capi/Cargo.toml b/ports/libsimpleservo/capi/Cargo.toml
index 2c629587c8f..06727830b0e 100644
--- a/ports/libsimpleservo/capi/Cargo.toml
+++ b/ports/libsimpleservo/capi/Cargo.toml
@@ -48,3 +48,4 @@ refcell_backtrace = ["simpleservo/refcell_backtrace"]
 uwp = ["simpleservo/uwp"]
 webdriver = ["simpleservo/webdriver"]
 webgl_backtrace = ["simpleservo/webgl_backtrace"]
+vslatestinstalled = ["simpleservo/vslatestinstalled"]