diff --git a/htdocs/resources/views/admin/gudang.blade.php b/htdocs/resources/views/admin/gudang.blade.php
index d78da8e1..10364862 100644
--- a/htdocs/resources/views/admin/gudang.blade.php
+++ b/htdocs/resources/views/admin/gudang.blade.php
@@ -530,7 +530,20 @@ $(document).ready(function() {
 		}
 	}
 
+	function syncInSatuanMode(){
+		var selected = $('#in_pos option:selected');
+		var satuanKecil = (selected.data('satuan-kecil') || '').toString().trim();
+		var konversi = parseInt(selected.data('konversi') || 1, 10);
+		var hasBreakdown = satuanKecil !== '' && konversi > 1;
+		$('#in_satuan_transaksi option[value="kecil"]').prop('disabled', !hasBreakdown);
+		if(!hasBreakdown){
+			$('#in_satuan_transaksi').val('besar');
+		}
+	}
+
+	$('#in_pos').on('change', function(){ syncInSatuanMode(); });
 	$('#out_pos').on('change', function(){ syncOutSatuanMode(); });
+	syncInSatuanMode();
 	syncOutSatuanMode();
 
 	$("#topbtntambahjenis").click(function(){