diff --git a/src/oned/code_39_reader.rs b/src/oned/code_39_reader.rs
index 613645f..14795c9 100644
--- a/src/oned/code_39_reader.rs
+++ b/src/oned/code_39_reader.rs
@@ -228,8 +228,8 @@ impl Code39Reader {
                         // return new int[]{patternStart, i};
                     }
                     patternStart += (counters[0] + counters[1]) as usize;
-                    let slc = counters[0..(counterPosition - 1)].to_vec();
-                    counters[2..(counterPosition - 1 + 2)].clone_from_slice(&slc[..]);
+                    let slc = counters[2..(counterPosition - 1 + 2)].to_vec();
+                    counters[0..(counterPosition - 1)].clone_from_slice(&slc[..]);
                     // System.arraycopy(counters, 2, counters, 0, counterPosition - 1);
                     counters[counterPosition - 1] = 0;
                     counters[counterPosition] = 0;
diff --git a/tests/code_39_blackbox_reader.rs b/tests/code_39_blackbox_reader.rs
index 61af5e8..6aa18c7 100644
--- a/tests/code_39_blackbox_reader.rs
+++ b/tests/code_39_blackbox_reader.rs
@@ -23,6 +23,8 @@ fn code39_black_box1_test_case() {
         BarcodeFormat::CODE_39,
     );
 
+    // 2 failes on row 169
+
     // super("src/test/resources/blackbox/code39-1", new MultiFormatReader(), BarcodeFormat.CODE_39);
     tester.add_test(4, 4, 0.0);
     tester.add_test(4, 4, 180.0);