Index: lib/libc/sys/Makefile.inc
===================================================================
--- lib/libc/sys/Makefile.inc
+++ lib/libc/sys/Makefile.inc
@@ -72,6 +72,7 @@
 	nanosleep \
 	open \
 	openat \
+	pdfork \
 	poll \
 	ppoll \
 	pselect \