--- configure.ac.orig
+++ configure.ac
@@ -36,7 +36,7 @@ AC_CHECK_HEADER([stdlib.h])
 # Check for system functions
 AC_CHECK_FUNCS(wcsdup)
 AC_CHECK_FUNCS(strndup)
-
+AC_SEARCH_LIBS(sin, m)
 # Checks for libraries.
 
 AC_PATH_X