diff --git a/jadx-core/src/main/java/jadx/core/dex/nodes/ClassNode.java b/jadx-core/src/main/java/jadx/core/dex/nodes/ClassNode.java
index 6786633ce58..20e898150ad 100644
--- a/jadx-core/src/main/java/jadx/core/dex/nodes/ClassNode.java
+++ b/jadx-core/src/main/java/jadx/core/dex/nodes/ClassNode.java
@@ -469,6 +469,9 @@ public List<FieldNode> getFields() {
 	}
 
 	public void addField(FieldNode fld) {
+		if (fields == Collections.EMPTY_LIST) {
+			fields = new ArrayList<>();
+		}
 		fields.add(fld);
 	}
 
diff --git a/jadx-core/src/main/java/jadx/core/utils/android/AndroidResourcesUtils.java b/jadx-core/src/main/java/jadx/core/utils/android/AndroidResourcesUtils.java
index 48d52db025c..3791c33fcbd 100644
--- a/jadx-core/src/main/java/jadx/core/utils/android/AndroidResourcesUtils.java
+++ b/jadx-core/src/main/java/jadx/core/utils/android/AndroidResourcesUtils.java
@@ -129,7 +129,7 @@ private static void addResourceFields(ClassNode resCls, ResourceStorage resStora
 				FieldNode newResField = new FieldNode(typeCls, rFieldInfo,
 						AccessFlags.PUBLIC | AccessFlags.STATIC | AccessFlags.FINAL);
 				newResField.addAttr(new EncodedValue(EncodedType.ENCODED_INT, resource.getId()));
-				typeCls.getFields().add(newResField);
+				typeCls.addField(newResField);
 				if (rClsExists) {
 					newResField.addInfoComment("Added by JADX");
 				}