--- js/src/Makefile.in.orig	2012-03-15 20:40:13.000000000 +0100
+++ js/src/Makefile.in	2012-03-16 10:03:18.000000000 +0100
@@ -737,7 +740,7 @@
 endif # WINNT
 
 ifeq ($(OS_ARCH),FreeBSD)
-EXTRA_LIBS	+= -pthread
+EXTRA_LIBS	+= -pthread -lc
 endif
 ifeq ($(OS_ARCH),Linux)
 EXTRA_LIBS	+= -ldl