diff --git a/libguestfs.changes b/libguestfs.changes
index f178929..6def7f9 100644
--- a/libguestfs.changes
+++ b/libguestfs.changes
@@ -1,3 +1,9 @@
+-------------------------------------------------------------------
+Mon Sep  4 19:15:25 UTC 2017 - cbosdonnat@suse.com
+
+- Tweak configuration before building for python3 or PyString_*
+  symbols will still be missing
+
 -------------------------------------------------------------------
 Thu Aug 31 15:25:06 UTC 2017 - cbosdonnat@suse.com
 
diff --git a/libguestfs.spec b/libguestfs.spec
index 755f159..9ead920 100644
--- a/libguestfs.spec
+++ b/libguestfs.spec
@@ -653,8 +653,16 @@ pushd python
 sed -i -e "s:libraries=:library_dirs=['$RPM_BUILD_ROOT/%{_libdir}'], libraries=:" setup.py
 make stamp-extra-files
 # Build needs libguestfs library to be installed
-%python_build
-%python_install
+
+# HACKY! Change config.h for python2
+echo '#define HAVE_PYSTRING_ASSTRING 1' >> config.h
+%python2_build
+%python2_install
+
+# HACKY! Change config.h for python3
+sed 's/\(#define HAVE_PYSTRING_ASSTRING 1\)/\/* \1 *\//' -i config.h
+%python3_build
+%python3_install
 popd
 %endif