diff --git a/compiler/rustc_session/src/config.rs b/compiler/rustc_session/src/config.rs
index ac4bce7350b90..8eb29fa99eca2 100644
--- a/compiler/rustc_session/src/config.rs
+++ b/compiler/rustc_session/src/config.rs
@@ -756,7 +756,7 @@ impl DebuggingOptions {
     }
 
     pub fn get_symbol_mangling_version(&self) -> SymbolManglingVersion {
-        self.symbol_mangling_version.unwrap_or(SymbolManglingVersion::Legacy)
+        self.symbol_mangling_version.unwrap_or(SymbolManglingVersion::V0)
     }
 }