--- a/configure.in
+++ b/configure.in
@@ -12,6 +12,7 @@
 AC_PROG_INSTALL
 
 # Checks for libraries
+AC_SEARCH_LIBS(ceil, m)
 pkg_modules="gtk+-2.0 gthread-2.0 libglade-2.0"
 PKG_CHECK_MODULES(PACKAGE, [$pkg_modules])
 AC_SUBST(PACKAGE_CFLAGS)