diff --git a/m4/check-package.m4 b/m4/check-package.m4
index b6243250a9c16b8db19966173ef27d2d5692711f..a35f143b153041fa60e460dbf9f875fcb47228b1 100644
--- a/m4/check-package.m4
+++ b/m4/check-package.m4
@@ -231,6 +231,7 @@ fi
 
 fi dnl disable fi
 
+AM_CONDITIONAL([HAVE_]UPNAME, [test -n "$[]UPNAME[_LIB]"])
 AC_SUBST(UPNAME[_INCLUDE_PATH])
 AC_SUBST(UPNAME[_LIB_PATH])
 AC_SUBST(UPNAME[_INCLUDE])