diff --git a/osm-garmin/app/build-gmap.sh b/osm-garmin/app/build-gmap.sh
index 02672e7..84b40ad 100755
--- a/osm-garmin/app/build-gmap.sh
+++ b/osm-garmin/app/build-gmap.sh
@@ -131,8 +131,8 @@ mkdir -p "$maps_dir"
 mkdir -p "$out_dir"
 mkdir -p "$tiles_dir"
 
-[[ -n "$regions" ]] && die "No regions given (1st argument)"
-[[ -n "$style" ]] && die "No style given (2nd argument)"
+[[ -z "$regions" ]] && die "No regions given (1st argument)"
+[[ -z "$style" ]] && die "No style given (2nd argument)"
 
 regions_array="$(echo $regions | tr ";" "\n")"
 is_updates="false"