diff --git a/installer.sh.in b/installer.sh.in
index 2e6e31c..17ec46e 100644
--- a/installer.sh.in
+++ b/installer.sh.in
@@ -1425,7 +1425,7 @@ menu() {
     esac
 }
 
-if [ ! -x /bin/dialog ]; then
+if ! command -v dialog >/dev/null; then
     echo "ERROR: missing dialog command, exiting..."
     exit 1
 fi