diff --git a/sdk-extensions/incubator/src/main/java/io/opentelemetry/sdk/extension/incubator/fileconfig/AttributesFactory.java b/sdk-extensions/incubator/src/main/java/io/opentelemetry/sdk/extension/incubator/fileconfig/AttributesFactory.java
index 2ae94d45846..92e385992f1 100644
--- a/sdk-extensions/incubator/src/main/java/io/opentelemetry/sdk/extension/incubator/fileconfig/AttributesFactory.java
+++ b/sdk-extensions/incubator/src/main/java/io/opentelemetry/sdk/extension/incubator/fileconfig/AttributesFactory.java
@@ -48,7 +48,6 @@ public io.opentelemetry.api.common.Attributes create(
                 throw new ConfigurationException(
                     "Error processing attribute with key \"" + key + "\": unexpected null value");
               }
-              Class<?> valueClass = value.getClass();
               if (value instanceof String) {
                 builder.put(key, (String) value);
                 return;
@@ -73,7 +72,7 @@ public io.opentelemetry.api.common.Attributes create(
                 builder.put(key, (boolean) value);
                 return;
               }
-              if (List.class.isAssignableFrom(valueClass)) {
+              if (value instanceof List) {
                 List<?> values = (List<?>) value;
                 if (values.isEmpty()) {
                   return;
diff --git a/sdk-extensions/incubator/src/test/java/io/opentelemetry/sdk/extension/incubator/fileconfig/AttributesFactoryTest.java b/sdk-extensions/incubator/src/test/java/io/opentelemetry/sdk/extension/incubator/fileconfig/AttributesFactoryTest.java
index dca78ba641c..bdba5e80bb7 100644
--- a/sdk-extensions/incubator/src/test/java/io/opentelemetry/sdk/extension/incubator/fileconfig/AttributesFactoryTest.java
+++ b/sdk-extensions/incubator/src/test/java/io/opentelemetry/sdk/extension/incubator/fileconfig/AttributesFactoryTest.java
@@ -76,7 +76,8 @@ void create() {
                         .withAdditionalProperty("intArrKey", Arrays.asList(1, 2))
                         .withAdditionalProperty("doubleArrKey", Arrays.asList(1.0d, 2.0d))
                         .withAdditionalProperty("floatArrKey", Arrays.asList(1.0f, 2.0f))
-                        .withAdditionalProperty("boolArrKey", Arrays.asList(true, false)),
+                        .withAdditionalProperty("boolArrKey", Arrays.asList(true, false))
+                        .withAdditionalProperty("emptyArrKey", Collections.emptyList()),
                     mock(SpiHelper.class),
                     Collections.emptyList()))
         .isEqualTo(