diff --git a/src/fpylll/fplll/enumeration.pyx b/src/fpylll/fplll/enumeration.pyx
index efa0a90c..c14c4d61 100644
--- a/src/fpylll/fplll/enumeration.pyx
+++ b/src/fpylll/fplll/enumeration.pyx
@@ -1,6 +1,6 @@
 # -*- coding: utf-8 -*-
 include "fpylll/config.pxi"
-
+
 from cython.operator cimport dereference as deref, preincrement as inc
 
 from libcpp.vector cimport vector
diff --git a/src/fpylll/fplll/enumeration_callback_helper.h b/src/fpylll/fplll/enumeration_callback_helper.h
index c0994300..6fe7914e 100644
--- a/src/fpylll/fplll/enumeration_callback_helper.h
+++ b/src/fpylll/fplll/enumeration_callback_helper.h
@@ -5,9 +5,9 @@
 #include <Python.h>
 #include <fplll/fplll.h>
 
-extern "C" {
+//extern "C" {
   bool evaluator_callback_call_obj(PyObject *obj, int n, double *new_sol_coord);
-}
+//}
 
 class PyCallbackEvaluatorWrapper {
 public:
diff --git a/src/fpylll/fplll/fplll.pxd b/src/fpylll/fplll/fplll.pxd
index 4b5207ec..c5b7b1d7 100644
--- a/src/fpylll/fplll/fplll.pxd
+++ b/src/fpylll/fplll/fplll.pxd
@@ -844,7 +844,7 @@ cdef extern from "fplll/bkz_param.h" namespace "fplll":
 
         string dump_gso_filename
 
-    vector[Strategy] load_strategies_json(const string &filename) nogil except+
+    vector[Strategy] load_strategies_json(const string &filename) except + nogil
     const string default_strategy_path() nogil
     const string default_strategy() nogil
     const string strategy_full_path(const string &strategy_path) nogil
@@ -859,19 +859,19 @@ cdef extern from "fplll/bkz.h" namespace "fplll":
         int svp_preprocessing(int kappa, int block_size, const BKZParam &param) nogil
         int svp_postprocessing(int kappa, int block_size, const vector[FT] &solution) nogil
 
-        int svp_reduction(int kappa, int block_size, const BKZParam &param, int dual) nogil except +
+        int svp_reduction(int kappa, int block_size, const BKZParam &param, int dual) except + nogil
 
-        int tour(const int loop, int &kappa_max, const BKZParam &param, int min_row, int max_row) nogil except +
-        int sd_tour(const int loop, const BKZParam &param, int min_row, int max_row) nogil except +
-        int slide_tour(const int loop, const BKZParam &param, int min_row, int max_row) nogil except +
+        int tour(const int loop, int &kappa_max, const BKZParam &param, int min_row, int max_row) except + nogil
+        int sd_tour(const int loop, const BKZParam &param, int min_row, int max_row) except + nogil
+        int slide_tour(const int loop, const BKZParam &param, int min_row, int max_row) except + nogil
 
-        int hkz(int &kappaMax, const BKZParam &param, int min_row, int max_row) nogil except +
+        int hkz(int &kappaMax, const BKZParam &param, int min_row, int max_row) except + nogil
 
         int bkz()
 
-        void rerandomize_block(int min_row, int max_row, int density) nogil except +
+        void rerandomize_block(int min_row, int max_row, int density) except + nogil
 
-        void dump_gso(const string filename, const string prefix, int append) nogil except +
+        void dump_gso(const string filename, const string prefix, int append) except + nogil
 
         int status