diff --git a/libexec/scoop-depends.ps1 b/libexec/scoop-depends.ps1
index 1cf4d6e8..3b1f3b91 100644
--- a/libexec/scoop-depends.ps1
+++ b/libexec/scoop-depends.ps1
@@ -17,7 +17,7 @@ $app = $apps[0]
 
 if(!$app) { "<app> missing"; my_usage; exit 1 }
 
-$architecture = ensure_architecture ($opt.a + $opt.architecture)
+$architecture = ensure_architecture ($opt.a + $opt.arch)
 
 $deps = @(deps $app $architecture)
 if($deps) {
diff --git a/libexec/scoop-install.ps1 b/libexec/scoop-install.ps1
index 583a1e1c..8091182c 100644
--- a/libexec/scoop-install.ps1
+++ b/libexec/scoop-install.ps1
@@ -45,7 +45,7 @@ $opt, $apps, $err = getopt $args 'ga:' 'global', 'arch='
 if($err) { "scoop install: $err"; exit 1 }
 
 $global = $opt.g -or $opt.global
-$architecture = ensure_architecture $opt.a + $opt.arch
+$architecture = ensure_architecture ($opt.a + $opt.arch)
 
 if(!$apps) { 'ERROR: <app> missing'; my_usage; exit 1 }