diff --git a/BasicNodes/File/FileSize.cs b/BasicNodes/File/FileSize.cs
index d8d81733..ce6a746b 100644
--- a/BasicNodes/File/FileSize.cs
+++ b/BasicNodes/File/FileSize.cs
@@ -31,9 +31,9 @@ namespace FileFlows.BasicNodes.File
 
         public int TestSize(NodeParameters args, long size)
         {
-            if (size < (Lower * 1024 * 1024))
+            if (size < (((long)Lower) * 1024 * 1024))
                 return 2;
-            if (Upper > 0 && size > (Upper * 1024 * 1024))
+            if (Upper > 0 && size > (((long)Upper) * 1024 * 1024))
                 return 2;
             return 1;
         }
diff --git a/BasicNodes/Tests/FileSizeTests.cs b/BasicNodes/Tests/FileSizeTests.cs
index 0abb7ca8..13d95e37 100644
--- a/BasicNodes/Tests/FileSizeTests.cs
+++ b/BasicNodes/Tests/FileSizeTests.cs
@@ -51,6 +51,21 @@ namespace BasicNodes.Tests
             var result = pm.TestSize(Args, 5 * 1024 * 1024);
             Assert.AreEqual(1, result);
         }
+
+        [TestMethod]
+        public void FileSize_25GB()
+        {
+            FileSize pm = new FileSize();
+            pm.Upper = 25600;
+            long fileSize = 2240000000; // 2.24GB
+            var result = pm.TestSize(Args, fileSize);
+            Assert.AreEqual(1, result);
+
+            pm.Upper = 25600;
+            fileSize = 224000000000; // 2.24GB
+            result = pm.TestSize(Args, fileSize);
+            Assert.AreEqual(2, result);
+        }
     }
 }