diff --git a/alliance/src/exp/configure.in b/alliance/src/exp/configure.in
index 444300cc..966c4e10 100644
--- a/alliance/src/exp/configure.in
+++ b/alliance/src/exp/configure.in
@@ -25,6 +25,8 @@ AC_PROG_MAKE_SET
 
 dnl Checks for typedefs, structures, and compiler characteristics.
 AC_C_CONST
+AC_CHECK_LIB(m, floor)
+AC_CHECK_LIB(fl, yywrap)
 
 AM_ALLIANCE