diff --git a/rust/config/global.go b/rust/config/global.go
index 6943467b0..e83e23aa5 100644
--- a/rust/config/global.go
+++ b/rust/config/global.go
@@ -24,7 +24,7 @@ import (
 var (
 	pctx = android.NewPackageContext("android/soong/rust/config")
 
-	RustDefaultVersion = "1.78.0"
+	RustDefaultVersion = "1.77.1.p1"
 	RustDefaultBase    = "prebuilts/rust/"
 	DefaultEdition     = "2021"
 	Stdlibs            = []string{