diff --git a/Makefile b/Makefile
index 927105d..f94ec7b 100644
--- a/Makefile
+++ b/Makefile
@@ -926,7 +926,7 @@
 
 ifneq ($(NEED_POSIX_SOCKETS), )
 ifeq ($(TARGET_OS), SunOS)
-LIBS += -lsocket
+LIBS += -lsocket -lnsl
 endif
 endif