diff --git a/src/com/webcodepro/applecommander/storage/DosFileEntry.java b/src/com/webcodepro/applecommander/storage/DosFileEntry.java
index 515bc43..1d4cde4 100644
--- a/src/com/webcodepro/applecommander/storage/DosFileEntry.java
+++ b/src/com/webcodepro/applecommander/storage/DosFileEntry.java
@@ -183,6 +183,7 @@ public class DosFileEntry implements FileEntry {
 		}
 		// default to nothing special, just compute from number of sectors
 		int size = (getSectorsUsed()-1) * Disk.SECTOR_SIZE;
+		if (size < 1) size = 0;	// we assume a T/S block is included (may not be)
 		if (rawdata != null) {
 			if ("B".equals(getFiletype())) {
 				// binary
diff --git a/src/com/webcodepro/applecommander/storage/DosFormatDisk.java b/src/com/webcodepro/applecommander/storage/DosFormatDisk.java
index 4bd263b..89ce35c 100644
--- a/src/com/webcodepro/applecommander/storage/DosFormatDisk.java
+++ b/src/com/webcodepro/applecommander/storage/DosFormatDisk.java
@@ -398,7 +398,15 @@ public class DosFormatDisk extends FormattedDisk {
 		DosFileEntry dosEntry = (DosFileEntry) fileEntry;
 		// Size is calculated by sectors used - not actual size - as size varies
 		// on filetype, etc.
-		byte[] fileData = new byte[(dosEntry.getSectorsUsed()-1) * SECTOR_SIZE];
+		int filesize = dosEntry.getSectorsUsed();
+		byte[] fileData = null;
+		if (filesize > 0) {
+			fileData = new byte[(dosEntry.getSectorsUsed()-1) * SECTOR_SIZE];
+		} else {
+			fileData = new byte[0];
+			// don't need to load it - also bypass potential issues
+			return fileData;
+		}
 		int track = dosEntry.getTrack();
 		int sector = dosEntry.getSector();
 		int offset = 0;