diff --git a/projects/determineversion.vbs b/projects/determineversion.vbs
--- a/projects/determineversion.vbs
+++ b/projects/determineversion.vbs
@@ -273,12 +273,12 @@ Function IsCachedVersion(ByVal version)
 End Function
 
 Function CheckFile(filename)
-	CheckFile = FSO.FileExists(filename) And (FSO.GetFile(filename).DateLastModified >= FSO.GetFile(filename & ".in").DateLastModified)
+	CheckFile = FSO.FileExists(filename)
+	If CheckFile Then CheckFile = (FSO.GetFile(filename).DateLastModified >= FSO.GetFile(filename & ".in").DateLastModified)
 End Function
 
 Dim version
 version = DetermineSVNVersion
 If Not (IsCachedVersion(version) And CheckFile("../src/rev.cpp") And CheckFile("../src/ottdres.rc")) Then
-	wscript.echo "update"
 	UpdateFiles version
 End If