diff --git a/source/tvision/tdircoll.cpp b/source/tvision/tdircoll.cpp
index a8ea03a5..07450a66 100644
--- a/source/tvision/tdircoll.cpp
+++ b/source/tvision/tdircoll.cpp
@@ -38,7 +38,7 @@
 
 Boolean driveValid( char drive ) noexcept
 {
-#ifdef _WIN32
+#if defined( __BORLANDC__ ) || defined( _WIN32 )
 #if !defined( __FLAT__ )
 I       MOV     AH, 19H     // Save the current drive in BL
 I       INT     21H