diff --git a/configure.ac b/configure.ac
index 2b06270c..6007d65a 100644
--- a/configure.ac
+++ b/configure.ac
@@ -289,6 +289,11 @@ if test "x$ac_cv_want_fldigi" = "xyes"; then
     AC_FLDIGI_JSONCPP
 fi
 
+### libssl
+if test "x$ac_cv_want_fldigi" = "xyes"; then
+    AC_FLDIGI_PKG_CHECK([ssl], [libssl], [no], [no])
+fi
+
 ### libintl
 # Substitute INTL_CFLAGS in Makefile
 # Substitute INTL_LIBS in Makefile
diff --git a/m4/build.m4 b/m4/build.m4
index 96c6e282..1e4688ef 100644
--- a/m4/build.m4
+++ b/m4/build.m4
@@ -21,7 +21,8 @@ $INTL_CFLAGS $PTW32_CFLAGS $BFD_CFLAGS -pipe -Wall -fexceptions $OPT_CFLAGS $DEB
   fi
 # LDADD
   FLDIGI_BUILD_LDADD="$PORTAUDIO_LIBS $FLTK_LIBS $X_LIBS $SNDFILE_LIBS $SAMPLERATE_LIBS \
-$PULSEAUDIO_LIBS $HAMLIB_LIBS $PNG_LIBS $CURL_LIBS $XMLRPC_LIBS $INTL_LIBS $PTW32_LIBS $BFD_LIBS $EXTRA_LIBS"
+$PULSEAUDIO_LIBS $HAMLIB_LIBS $PNG_LIBS $CURL_LIBS $XMLRPC_LIBS $INTL_LIBS $PTW32_LIBS $BFD_LIBS $EXTRA_LIBS \
+$SSL_LIBS"
 
 # CPPFLAGS
   FLARQ_BUILD_CPPFLAGS="-I\$(srcdir) -I\$(srcdir)/include -I\$(srcdir)/fileselector \