Index: aclocal/dc_pcsc.m4
==================================================================
--- aclocal/dc_pcsc.m4
+++ aclocal/dc_pcsc.m4
@@ -6,10 +6,22 @@
 	])
 
 	if test "${manualheaders}" != "no"; then
 		CFLAGS="${CFLAGS} -I${manualheaders}"
 		CPPFLAGS="${CPPFLAGS} -I${manualheaders}"
+
+		AC_CHECK_HEADER(wintypes.h, [
+			AC_DEFINE(HAVE_WINTYPES_H, [1], [Define if you have the PCSC-Lite header file (you should)])
+		])
+
+		AC_CHECK_HEADER(pcsclite.h, [
+			AC_DEFINE(HAVE_PCSCLITE_H, [1], [Define if you have the PCSC-Lite header file (you should)])
+		])
+
+		AC_CHECK_HEADER(winscard.h, [
+			AC_DEFINE(HAVE_WINSCARD_H, [1], [Define if you have the PCSC-Lite header file (you should)])
+		])
 	else
 		DC_PCSC_HEADERS_SEARCH
 	fi
 ])
 

Index: configure.ac
==================================================================
--- configure.ac
+++ configure.ac
@@ -1,6 +1,6 @@
-AC_INIT(cackey, 0.5.14) 
+AC_INIT(cackey, 0.5.15) 
 AC_CONFIG_HEADERS(config.h)
 
 dnl Locate standard tools
 AC_PROG_CC
 AC_PROG_MAKE_SET