diff --git a/src/java/org/apache/poi/ss/util/CellUtil.java b/src/java/org/apache/poi/ss/util/CellUtil.java
index 9dabd2b631..24d9a5126a 100644
--- a/src/java/org/apache/poi/ss/util/CellUtil.java
+++ b/src/java/org/apache/poi/ss/util/CellUtil.java
@@ -84,9 +84,12 @@ public final class CellUtil {
                     FILL_BACKGROUND_COLOR,
                     INDENTION,
                     DATA_FORMAT,
-                    FONT,
                     ROTATION
             )));
+    private static final Set<String> intValues = Collections.unmodifiableSet(
+            new HashSet<>(Arrays.asList(
+                    FONT
+            )));
     private static final Set<String> booleanValues = Collections.unmodifiableSet(
             new HashSet<>(Arrays.asList(
                     LOCKED,
@@ -369,6 +372,8 @@ public final class CellUtil {
         for (final String key : src.keySet()) {
             if (shortValues.contains(key)) {
                 dest.put(key, getShort(src, key));
+            } else if (intValues.contains(key)) {
+                dest.put(key, getInt(src, key));
             } else if (booleanValues.contains(key)) {
                 dest.put(key, getBoolean(src, key));
             } else if (borderTypeValues.contains(key)) {
diff --git a/src/testcases/org/apache/poi/ss/util/BaseTestCellUtil.java b/src/testcases/org/apache/poi/ss/util/BaseTestCellUtil.java
index fc507c90e0..416dd4d55b 100644
--- a/src/testcases/org/apache/poi/ss/util/BaseTestCellUtil.java
+++ b/src/testcases/org/apache/poi/ss/util/BaseTestCellUtil.java
@@ -378,4 +378,23 @@ public abstract class BaseTestCellUtil {
 
         wb1.close();
     }
+
+    /**
+     * bug 63268
+     * @since POI 4.1.0
+     */
+    @Test
+    public void setFontShouldNotCreateDuplicateStyle() throws IOException {
+        Workbook wb1 = _testDataProvider.createWorkbook();
+        Cell c = wb1.createSheet().createRow(1).createCell(1);
+        Font f = wb1.createFont();
+
+        CellUtil.setFont(c, f);
+        int num1 = wb1.getNumCellStyles();
+
+        CellUtil.setFont(c, f);
+        int num2 = wb1.getNumCellStyles();
+        assertEquals(num1, num2);
+        wb1.close();
+    }
 }