diff --git a/curspriv.h b/curspriv.h
index 1ce8cdb6..dcfd6479 100644
--- a/curspriv.h
+++ b/curspriv.h
@@ -32,12 +32,6 @@
 # define _CRT_SECURE_NO_DEPRECATE 1   /* kill nonsense warnings */
 #endif
 
-#if (defined(__CYGWIN32__) || defined(_WIN32)) && !defined(__TURBOC__) && \
-    !defined(__LCC__) && !defined(__DMC__) && !defined(__MINGW32__) && \
-    !defined(HAVE_INFOEX)
-# define HAVE_INFOEX
-#endif
-
 /*----------------------------------------------------------------------*/
 
 typedef struct           /* structure for ripped off lines */
diff --git a/win32/pdcwin.h b/win32/pdcwin.h
index e3bc41c8..fae475c1 100644
--- a/win32/pdcwin.h
+++ b/win32/pdcwin.h
@@ -14,6 +14,11 @@
 # define PDC_ATTR_SHIFT 8
 #endif
 
+#if (defined(__CYGWIN32__) || defined(__WATCOMC__) || defined(_MSC_VER)) && \
+    !defined(HAVE_INFOEX)
+# define HAVE_INFOEX
+#endif
+
 extern unsigned char *pdc_atrtab;
 extern HANDLE pdc_con_out, pdc_con_in;
 extern DWORD pdc_quick_edit;