diff -ubr popa3d-1.0.2-orig/Makefile popa3d-1.0.2/Makefile
--- popa3d-1.0.2-orig/Makefile	2012-09-19 01:19:56.698098130 +0200
+++ popa3d-1.0.2/Makefile	2012-09-19 01:24:33.871750473 +0200
@@ -9,7 +9,7 @@
 LDFLAGS = -s
 LIBS =
 # Linux with glibc, FreeBSD, NetBSD
-#LIBS += -lcrypt
+LIBS += -lcrypt
 # HP-UX trusted system
 #LIBS += -lsec
 # Solaris (POP_STANDALONE, POP_VIRTUAL)