diff --git a/src/deb/cross.rs b/src/deb/cross.rs
index 8cd849d..1ce8f27 100644
--- a/src/deb/cross.rs
+++ b/src/deb/cross.rs
@@ -153,7 +153,8 @@ pub fn setup_environment(
     let dpkg_architecture = String::from_utf8(
         context::current()
             .command("dpkg-architecture")
-            .arg(format!("-a{}", arch))
+            .arg("-a")
+            .arg(arch)
             .output()?
             .stdout,
     )?;