diff --git a/weechat/configure.ac b/weechat/configure.ac

index 2d23b36..4a0c24f 100644

--- a/weechat/configure.ac

+++ b/weechat/configure.ac

@@ -548,9 +548,14 @@ PYTHON_VERSION=

 if test "x$enable_python" = "xyes" ; then

     if test "x$enable_python3" = "xyes" ; then

         AC_PATH_PROGS(PYTHON, python3.7 python3.6 python3.5 python3.4 python3.3 python3.2 python3.1 python3.0 python3 python2.7 python2.6 python2.5 python2 python)

+        python_pkg_module=python3

     else

         AC_PATH_PROGS(PYTHON, python2.7 python2.6 python2.5 python2 python)

+        python_pkg_module=python2

     fi

+    PYTHON_VERSION=`$PKGCONFIG --modversion $python_pkg_module`

+    PYTHON_LFLAGS=`$PKGCONFIG --libs $python_pkg_module`

+    PYTHON_CFLAGS=`$PKGCONFIG --cflags $python_pkg_module`

     if test -z $PYTHON ; then

         AC_MSG_WARN([

 *** Python must be installed on your system but python interpreter couldn't be found in path.

@@ -558,7 +563,7 @@ if test "x$enable_python" = "xyes" ; the

 *** WeeChat will be built without Python support.])

         enable_python="no"

         not_found="$not_found python"

-    else

+    elif test -z "$PYTHON_VERSION" ; then

         PYTHON_SYSPREFIX=`$PYTHON -c 'import sys; sys.stdout.write("%s" % sys.prefix)'`

         PYTHON_VERSION=`$PYTHON -c 'import sys; sys.stdout.write(sys.version[[:3]])'`

         PYTHON_INCLUDE=`$PYTHON -c "import sys, distutils.sysconfig, string; sys.stdout.write(distutils.sysconfig.get_config_var('INCLUDEPY'))"`