diff --git a/core/src/com/google/zxing/oned/AbstractUPCEANReader.java b/core/src/com/google/zxing/oned/AbstractUPCEANReader.java
index 741424bf1..9b4191348 100644
--- a/core/src/com/google/zxing/oned/AbstractUPCEANReader.java
+++ b/core/src/com/google/zxing/oned/AbstractUPCEANReader.java
@@ -207,6 +207,8 @@ public abstract class AbstractUPCEANReader extends AbstractOneDReader implements
           for (int y = 2; y < patternLength; y++) {
             counters[y - 2] = counters[y];
           }
+          counters[patternLength - 2] = 0;
+          counters[patternLength - 1] = 0;
           counterPosition--;
         } else {
           counterPosition++;
diff --git a/core/src/com/google/zxing/oned/Code128Reader.java b/core/src/com/google/zxing/oned/Code128Reader.java
index 7dfb953d0..a46c7cee3 100644
--- a/core/src/com/google/zxing/oned/Code128Reader.java
+++ b/core/src/com/google/zxing/oned/Code128Reader.java
@@ -196,6 +196,8 @@ public final class Code128Reader extends AbstractOneDReader {
           for (int y = 2; y < patternLength; y++) {
             counters[y - 2] = counters[y];
           }
+          counters[patternLength - 2] = 0;
+          counters[patternLength - 1] = 0;
           counterPosition--;
         } else {
           counterPosition++;