diff --git a/src/main/java/synapticloop/b2/request/B2ListPartsRequest.java b/src/main/java/synapticloop/b2/request/B2ListPartsRequest.java
index 49d6fb3..7a5d397 100644
--- a/src/main/java/synapticloop/b2/request/B2ListPartsRequest.java
+++ b/src/main/java/synapticloop/b2/request/B2ListPartsRequest.java
@@ -55,7 +55,7 @@ public B2ListPartsRequest(CloseableHttpClient client, B2AuthorizeAccountResponse
 		if (startPartNumber != null) {
 			this.addParameter(B2RequestProperties.KEY_START_PART_NUMBER, String.valueOf(startPartNumber));
 		}
-		if (startPartNumber != null) {
+		if (maxPartCount != null) {
 			this.addParameter(B2RequestProperties.KEY_MAX_PART_COUNT, String.valueOf(maxPartCount));
 		}
 	}