diff --git a/build.sh b/build.sh
index 8c83ff5..59ebc76 100755
--- a/build.sh
+++ b/build.sh
@@ -7,7 +7,7 @@ mainverstr="s/ver_1/4/g"  #版本控制
 minver="06"
 minverstr="s/ver_2/"
 
-
+sudo apt install libudev-dev
 if [ "$sys" == "UnionTech" ];then
     # uos ...
 
diff --git a/hgdriver/hgdev/hg_scanner_239.cpp b/hgdriver/hgdev/hg_scanner_239.cpp
index 6829d89..4f38871 100644
--- a/hgdriver/hgdev/hg_scanner_239.cpp
+++ b/hgdriver/hgdev/hg_scanner_239.cpp
@@ -883,7 +883,7 @@ else
 {
 	ic.cropRect.enable = custom_area_;
 	int height = (custom_area_br_y_ *ic.resolution_dst) /25.4 -  (custom_area_lt_y_ *ic.resolution_dst /25.4);
-	int width 	= (custom_area_br_x_ *ic.resolution_dst) /25.4 - (custom_area_lt_x_ *ic.resolution_dst /25.4);
+	int width  = (custom_area_br_x_ *ic.resolution_dst) /25.4 - (custom_area_lt_x_ *ic.resolution_dst /25.4);
 	ic.cropRect.height = height;
 	ic.cropRect.width = width;
 	ic.cropRect.x = custom_area_lt_x_ *ic.resolution_dst /25.4;