diff --git a/configure.ac b/configure.ac
index d9f3ea987..6e6d0e03d 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1351,6 +1351,7 @@ AC_C_INLINE
 AC_C_VOLATILE
 AC_TYPE_SIZE_T
 AC_TYPE_MODE_T
+AC_TYPE_SIGNAL
 AC_CHECK_FUNCS([sigdescr_np])
 AC_DECL_SYS_SIGLIST