diff --git a/tests/controls/styledtextctrltest.cpp b/tests/controls/styledtextctrltest.cpp
index 531c6d579c..4b74604e7d 100644
--- a/tests/controls/styledtextctrltest.cpp
+++ b/tests/controls/styledtextctrltest.cpp
@@ -11,7 +11,7 @@
 
 #if wxUSE_STC
 
-#if WXUSINGDLL
+#if defined(WXUSINGDLL)
 
 #ifdef __BORLANDC__
     #pragma hdrstop