diff --git a/poi/src/main/java/org/apache/poi/util/HexDump.java b/poi/src/main/java/org/apache/poi/util/HexDump.java
index f3ce580e4e7..a9a48c6836e 100644
--- a/poi/src/main/java/org/apache/poi/util/HexDump.java
+++ b/poi/src/main/java/org/apache/poi/util/HexDump.java
@@ -294,7 +294,7 @@ private static void writeHex(StringBuilder sb, long value, int nDigits, String p
         char[] buf = new char[nDigits];
         long acc = value;
         for(int i=nDigits-1; i>=0; i--) {
-            int digit = Math.toIntExact(acc & 0x0F);
+            int digit = (int) (acc & 0x0F);
             buf[i] = (char) (digit < 10 ? ('0' + digit) : ('A' + digit - 10));
             acc >>>= 4;
         }