diff --git a/src/main/java/org/qortal/api/resource/DataResource.java b/src/main/java/org/qortal/api/resource/DataResource.java
index ff4e3fda..ebfe20a9 100644
--- a/src/main/java/org/qortal/api/resource/DataResource.java
+++ b/src/main/java/org/qortal/api/resource/DataResource.java
@@ -110,7 +110,7 @@ public class DataResource {
 		}
 		LOGGER.info("Whole file digest: {}", dataFile.base58Digest());
 
-		int chunkCount = dataFile.split();
+		int chunkCount = dataFile.split(DataFile.CHUNK_SIZE);
 		if (chunkCount > 0) {
 			LOGGER.info(String.format("Successfully split into %d chunk%s", chunkCount, (chunkCount == 1 ? "" : "s")));
 			return "true";
@@ -146,7 +146,7 @@ public class DataResource {
 			}
 			LOGGER.info("Whole file digest: {}", dataFile.base58Digest());
 
-			int chunkCount = dataFile.split();
+			int chunkCount = dataFile.split(DataFile.CHUNK_SIZE);
 			if (chunkCount > 0) {
 				LOGGER.info(String.format("Successfully split into %d chunk%s", chunkCount, (chunkCount == 1 ? "" : "s")));
 				return "true";
diff --git a/src/main/java/org/qortal/storage/DataFile.java b/src/main/java/org/qortal/storage/DataFile.java
index 160af290..ce1e6203 100644
--- a/src/main/java/org/qortal/storage/DataFile.java
+++ b/src/main/java/org/qortal/storage/DataFile.java
@@ -170,10 +170,11 @@ public class DataFile {
     }
 
     public int split() {
+    public int split(int chunkSize) {
         try {
 
             File file = this.getFile();
-            byte[] buffer = new byte[CHUNK_SIZE];
+            byte[] buffer = new byte[chunkSize];
             this.chunks = new ArrayList<>();
 
             if (file != null) {