diff --git a/Plugins/ArchiveSource/ArchiveSource/ArchiveSource.m b/Plugins/ArchiveSource/ArchiveSource/ArchiveSource.m
index e62c6c225..c9566f86a 100644
--- a/Plugins/ArchiveSource/ArchiveSource/ArchiveSource.m
+++ b/Plugins/ArchiveSource/ArchiveSource/ArchiveSource.m
@@ -144,6 +144,8 @@ static BOOL g_parse_unpack_path(NSString * src, NSString ** archive, NSString **
 
 - (long)read:(void *)buffer amount:(long)amount
 {
+    if ( offset >= size )
+        return 0;
 	if ( size - offset < amount )
         amount = size - offset;
     memcpy( buffer, (const uint8_t *)data + offset, amount );