diff --git a/configure b/configure
index 4cdee79c4..e6392354d 100755
--- a/configure
+++ b/configure
@@ -2,7 +2,7 @@
 # Guess values for system-dependent variables and create Makefiles.
 # Generated by GNU Autoconf 2.53 for wsjt 0.9.
 #
-# $Id: configure.ac 69 2006-01-09 19:18:03Z va3db $
+# $Id: configure.ac 70 2006-01-09 21:30:35Z va3db $
 #
 # Copyright 1992, 1993, 1994, 1995, 1996, 1998, 1999, 2000, 2001, 2002
 # Free Software Foundation, Inc.
@@ -924,7 +924,7 @@ Free Software Foundation, Inc.
 This configure script is free software; the Free Software Foundation
 gives unlimited permission to copy, distribute and modify it.
 
-$Id: configure.ac 69 2006-01-09 19:18:03Z va3db $
+$Id: configure.ac 70 2006-01-09 21:30:35Z va3db $
 _ACEOF
   exit 0
 fi
@@ -5635,6 +5635,7 @@ _ACEOF
 
 	AUDIO="jtaudio.c"
 
+	LDFLAGS="${LDFLAGS} -lpthreads -lportaudio"
 fi
 
 
diff --git a/configure.ac b/configure.ac
index 3964b1b6d..e513ce912 100644
--- a/configure.ac
+++ b/configure.ac
@@ -231,6 +231,7 @@ fi
 if test "$portaudio" = yes; then
 	AC_DEFINE(USE_PORTAUDIO, 1, [Define if you want PORTAUDIO used.])
 	AC_SUBST(AUDIO, "jtaudio.c")
+	LDFLAGS="${LDFLAGS} -lpthreads -lportaudio"
 fi
 
 dnl set conf flags