diff --git a/src/common/wxexpr.cpp b/src/common/wxexpr.cpp
index d868716226..3db96de17a 100644
--- a/src/common/wxexpr.cpp
+++ b/src/common/wxexpr.cpp
@@ -20,7 +20,7 @@
 #pragma hdrstop
 #endif
 
-#if 1 // wxUSE_PROLOGIO
+#if wxUSE_PROLOGIO
 
 #include <stdarg.h>
 #include <ctype.h>