diff --git a/BasiliskII/src/MacOSX/configure.in b/BasiliskII/src/MacOSX/configure.in
index dabc2d49..bfb2f572 100644
--- a/BasiliskII/src/MacOSX/configure.in
+++ b/BasiliskII/src/MacOSX/configure.in
@@ -140,6 +140,7 @@ AC_CHECK_SIZEOF(long long, 8)
 AC_CHECK_SIZEOF(void *, 4)
 AC_TYPE_OFF_T
 AC_CHECK_TYPE(loff_t, off_t)
+AC_CHECK_TYPE(caddr_t, [char *])
 dnl TYPE_SOCKLEN_T
 AC_CHECK_TYPE(socklen_t)
 AC_TYPE_SIZE_T