diff --git a/configure.ac b/configure.ac
index c15962947da318351d1c253c20c697c539075294..b063dc3113c3a8a37d38eed0e1a7a3c471f47bc6 100644
--- a/configure.ac
+++ b/configure.ac
@@ -93,6 +93,8 @@ dnl SWIG wrappers
 
 if test "$enable_shared" = no; then
    AC_MSG_WARN([Python and Guile wrappers require --enable-shared; disabling])
+   GUILE_CONFIG=unknown
+   have_python=no
 else
 
 dnl Guile:
@@ -125,7 +127,6 @@ fi
 AC_SUBST(GUILE_SITEDIR)
 AC_SUBST(GUILE_CPPFLAGS)
 AC_SUBST(GUILE_LIBS)
-AM_CONDITIONAL(WITH_GUILE, test x"$GUILE_CONFIG" != "xunknown")
 
 dnl Python:
 AM_PATH_PYTHON([],[have_python=yes],[have_python=no])
@@ -150,9 +151,11 @@ if test $have_python = yes; then
   fi
   AC_SUBST(PYTHON_INCLUDE_DIR)
 fi
-AM_CONDITIONAL(WITH_PYTHON, test x"$have_python" = "xyes")
 
-fi
+fi # if enable_shared
+
+AM_CONDITIONAL(WITH_GUILE, test x"$GUILE_CONFIG" != "xunknown")
+AM_CONDITIONAL(WITH_PYTHON, test x"$have_python" = "xyes")
 
 dnl -----------------------------------------------------------------------
 dnl Compiling Octave plug-in