diff --git a/xtask/src/flags.rs b/xtask/src/flags.rs
index e72d8f22e4f0..7e8845a6e98b 100644
--- a/xtask/src/flags.rs
+++ b/xtask/src/flags.rs
@@ -309,7 +309,7 @@ impl Install {
         if (self.client || self.proc_macro_server) && !self.server {
             return None;
         }
-        let malloc = if self.mimalloc {
+        let malloc = if self.mimalloc || cfg!(windows) {
             Malloc::Mimalloc
         } else if self.jemalloc {
             Malloc::Jemalloc