diff --git a/configure.ac b/configure.ac
index 51f60394..83d4c959 100644
--- a/configure.ac
+++ b/configure.ac
@@ -234,6 +234,7 @@ if test "x$enable_smartcard" = "xyes"; then
     SMARTCARD_CFLAGS="$CAC_CARD_CFLAGS"
     AC_SUBST(SMARTCARD_LIBS)
     AC_SUBST(SMARTCARD_CFLAGS)
+    SPICE_REQUIRES+=" libcacard >= 0.1.2"
 fi