diff --git a/lib/libc/amd64/Makefile.inc b/lib/libc/amd64/Makefile.inc
new file mode 100644
index 00000000000..fb0879503a7
--- /dev/null
+++ b/lib/libc/amd64/Makefile.inc
@@ -0,0 +1,9 @@
+# $FreeBSD$
+#
+# Machine dependent definitions for the amd64 architecture.
+#
+
+#
+# AMD64 is 64-bit, so it doesn't need quad functions:
+#
+NO_QUAD=1