diff --git a/src/main/java/io/github/dsheirer/module/decode/p25/phase1/P25P1DataUnitDetector.java b/src/main/java/io/github/dsheirer/module/decode/p25/phase1/P25P1DataUnitDetector.java
index 274e0cd5..a2ba2ec8 100644
--- a/src/main/java/io/github/dsheirer/module/decode/p25/phase1/P25P1DataUnitDetector.java
+++ b/src/main/java/io/github/dsheirer/module/decode/p25/phase1/P25P1DataUnitDetector.java
@@ -1,23 +1,20 @@
 /*
+ * *****************************************************************************
+ * Copyright (C) 2014-2023 Dennis Sheirer
  *
- *  * ******************************************************************************
- *  * Copyright (C) 2014-2020 Dennis Sheirer
- *  *
- *  * This program is free software: you can redistribute it and/or modify
- *  * it under the terms of the GNU General Public License as published by
- *  * the Free Software Foundation, either version 3 of the License, or
- *  * (at your option) any later version.
- *  *
- *  * This program is distributed in the hope that it will be useful,
- *  * but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- *  * GNU General Public License for more details.
- *  *
- *  * You should have received a copy of the GNU General Public License
- *  * along with this program.  If not, see <http://www.gnu.org/licenses/>
- *  * *****************************************************************************
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
  *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
  *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>
+ * ****************************************************************************
  */
 package io.github.dsheirer.module.decode.p25.phase1;
 
@@ -493,6 +490,13 @@ public class P25P1DataUnitDetector implements Listener<Dibit>, ISyncDetectListen
          */
         public void put(Dibit dibit)
         {
+            //Note: this check is necessary where the previous runnable was interrupted and left the buffer
+            //pointer pointing past the end of the array length.
+            if(mPointer >= mBuffer.length)
+            {
+                mPointer = 0;
+            }
+
             mBuffer[mPointer++] = dibit;
 
             if(mPointer >= mBuffer.length)