diff --git a/pom.xml b/pom.xml
index bc8625a..0544ca3 100644
--- a/pom.xml
+++ b/pom.xml
@@ -6,7 +6,7 @@
 
   <groupId>com.github.alturkovic</groupId>
   <artifactId>asn-parser</artifactId>
-  <version>1.4.1</version>
+  <version>1.4.2</version>
 
   <name>asn-parser</name>
   <description>ASN.1 Decoding/Encoding</description>
diff --git a/src/main/java/com/github/alturkovic/asn/decoder/BerDecoder.java b/src/main/java/com/github/alturkovic/asn/decoder/BerDecoder.java
index 6977914..acde70c 100644
--- a/src/main/java/com/github/alturkovic/asn/decoder/BerDecoder.java
+++ b/src/main/java/com/github/alturkovic/asn/decoder/BerDecoder.java
@@ -154,13 +154,13 @@ private void decodeCollection(final Collection<Object> collection, final byte[]
 
         if (taggedField.getType().isInterface()) {
           final var asnClassDescription = loadAsnClassDescription(taggedField.getType());
-          collection.add(decodePolymorphic(asnClassDescription, elementBerData.toTlv()));
+          final var decodedType = decodePolymorphic(asnClassDescription, elementBerData.toTlv());
+          if (decodedType != null) {
+            collection.add(decodedType);
+          }
         } else if (taggedField.getElementTag().equals(parsedElementTag)) {
           if (taggedField.isStructured()) {
-            final Object decoded = decodeStructure(taggedField.getType(), elementBerData.toTlv());
-            if (decoded != null) {
-              collection.add(decoded);
-            }
+            collection.add(decodeStructure(taggedField.getType(), elementBerData.toTlv()));
           } else {
             //noinspection unchecked
             final var asnConverter = loadAsnConverterFromCache((Class<? extends AsnConverter<byte[], Object>>) taggedField.getConverter());