diff --git a/src/cargo.rs b/src/cargo.rs
index d0e53a5..76c787f 100644
--- a/src/cargo.rs
+++ b/src/cargo.rs
@@ -45,7 +45,7 @@ impl Rustflags {
     pub fn for_xargo(&self, home: &Home) -> String {
         let mut flags = self.flags.clone();
         flags.push("--sysroot".to_owned());
-        flags.push(home.display().to_string());
+        flags.push(format!("\"{}\"", home.display()));
         flags.join(" ")
     }
 }
@@ -68,7 +68,7 @@ impl Rustdocflags {
     /// Stringifies these flags for Xargo consumption
     pub fn for_xargo(mut self, home: &Home) -> String {
         self.flags.push("--sysroot".to_owned());
-        self.flags.push(home.display().to_string());
+        self.flags.push(format!("\"{}\"", home.display()));
         self.flags.join(" ")
     }
 }