diff --git a/substratevm/src/com.oracle.svm.core.genscavenge/src/com/oracle/svm/core/genscavenge/remset/AlignedChunkRememberedSet.java b/substratevm/src/com.oracle.svm.core.genscavenge/src/com/oracle/svm/core/genscavenge/remset/AlignedChunkRememberedSet.java
index 890774f41c0e..cac2fa902fb2 100644
--- a/substratevm/src/com.oracle.svm.core.genscavenge/src/com/oracle/svm/core/genscavenge/remset/AlignedChunkRememberedSet.java
+++ b/substratevm/src/com.oracle.svm.core.genscavenge/src/com/oracle/svm/core/genscavenge/remset/AlignedChunkRememberedSet.java
@@ -54,6 +54,11 @@ final class AlignedChunkRememberedSet {
     private AlignedChunkRememberedSet() {
     }
 
+    @Fold
+    public static int wordSize() {
+        return ConfigurationValues.getTarget().wordSize;
+    }
+
     @Fold
     public static UnsignedWord getHeaderSize() {
         UnsignedWord headerSize = getFirstObjectTableLimitOffset();
@@ -133,19 +138,23 @@ public static void walkDirtyObjects(AlignedHeader chunk, GreyToBlackObjectVisito
         UnsignedWord memorySize = objectsLimit.subtract(objectsStart);
         UnsignedWord indexLimit = CardTable.indexLimitForMemorySize(memorySize);
 
-        for (UnsignedWord index = WordFactory.zero(); index.belowThan(indexLimit); index = index.add(1)) {
-            if (CardTable.isDirty(cardTableStart, index)) {
+        for (UnsignedWord index = WordFactory.zero(); index.belowThan(indexLimit); index = index.add(wordSize())) {
+            UnsignedWord value = CardTable.readWord(cardTableStart, index);
+            if (value.notEqual(CardTable.CLEAN_WORD)) {
                 if (clean) {
-                    CardTable.setClean(cardTableStart, index);
+                    CardTable.cleanWord(cardTableStart, index);
                 }
-
-                Pointer ptr = FirstObjectTable.getFirstObjectImprecise(fotStart, objectsStart, objectsLimit, index);
-                Pointer cardLimit = CardTable.indexToMemoryPointer(objectsStart, index.add(1));
-                Pointer walkLimit = PointerUtils.min(cardLimit, objectsLimit);
-                while (ptr.belowThan(walkLimit)) {
-                    Object obj = ptr.toObject();
-                    visitor.visitObjectInline(obj);
-                    ptr = LayoutEncoding.getObjectEndInline(obj);
+                for (int i = 0; i < wordSize(); i++) {
+                    if (value.unsignedShiftRight(i * 8).and(0xFF).equal(CardTable.DIRTY_ENTRY)) {
+                        Pointer ptr = FirstObjectTable.getFirstObjectImprecise(fotStart, objectsStart, objectsLimit, index.add(i));
+                        Pointer cardLimit = CardTable.indexToMemoryPointer(objectsStart, index.add(i + 1));
+                        Pointer walkLimit = PointerUtils.min(cardLimit, objectsLimit);
+                        while (ptr.belowThan(walkLimit)) {
+                            Object obj = ptr.toObject();
+                            visitor.visitObjectInline(obj);
+                            ptr = LayoutEncoding.getObjectEndInline(obj);
+                        }
+                    }
                 }
             }
         }
diff --git a/substratevm/src/com.oracle.svm.core.genscavenge/src/com/oracle/svm/core/genscavenge/remset/CardTable.java b/substratevm/src/com.oracle.svm.core.genscavenge/src/com/oracle/svm/core/genscavenge/remset/CardTable.java
index 5bf1c95dd4be..4ef957458c4c 100644
--- a/substratevm/src/com.oracle.svm.core.genscavenge/src/com/oracle/svm/core/genscavenge/remset/CardTable.java
+++ b/substratevm/src/com.oracle.svm.core.genscavenge/src/com/oracle/svm/core/genscavenge/remset/CardTable.java
@@ -74,10 +74,11 @@
 final class CardTable {
     public static final int BYTES_COVERED_BY_ENTRY = 512;
 
-    private static final int ENTRY_SIZE_BYTES = 1;
+    static final int DIRTY_ENTRY = 0;
+    static final int CLEAN_ENTRY = 1;
+    static final UnsignedWord CLEAN_WORD = WordFactory.unsigned(0x0101010101010101L);
 
-    private static final int DIRTY_ENTRY = 0;
-    private static final int CLEAN_ENTRY = 1;
+    private static final int ENTRY_SIZE_BYTES = 1;
 
     private static final CardTableVerificationVisitor CARD_TABLE_VERIFICATION_VISITOR = new CardTableVerificationVisitor();
 
@@ -112,6 +113,14 @@ private static boolean isClean(Pointer table, UnsignedWord index) {
         return entry == CLEAN_ENTRY;
     }
 
+    public static UnsignedWord readWord(Pointer table, UnsignedWord index) {
+        return table.readWord(indexToTableOffset(index));
+    }
+
+    public static void cleanWord(Pointer table, UnsignedWord index) {
+        table.writeWord(indexToTableOffset(index), CLEAN_WORD, BarrierSnippets.CARD_REMEMBERED_SET_LOCATION);
+    }
+
     private static int readEntry(Pointer table, UnsignedWord index) {
         return table.readByte(indexToTableOffset(index));
     }