diff --git a/configure.ac b/configure.ac
index 1056a0a..3b4ad40 100644
--- a/configure.ac
+++ b/configure.ac
@@ -142,6 +142,7 @@
     ])
 AS_IF([test "x$ENABLE_PCSC" = "xyes"], [
 	PKG_CHECK_MODULES(PCSC, libpcsclite)
+	AC_DEFINE([HAVE_PCSC],[1],[Build with PC/SC support])
 ])
 AM_CONDITIONAL(ENABLE_PCSC, test "x$ENABLE_PCSC" = "xyes")
 AC_SUBST(ENABLE_PCSC)