Index: c/_gpaw.c
===================================================================
--- c/_gpaw.c	(revision 11461)
+++ c/_gpaw.c	(working copy)
@@ -8,7 +8,7 @@
 #include <numpy/arrayobject.h>
 
 #ifdef GPAW_WITH_HDF5 
-PyMODINIT_FUNC init_hdf5(void); 
+PyMODINIT_FUNC init_gpaw_hdf5(void); 
 #endif 
 
 #ifdef GPAW_HPM
@@ -383,7 +383,7 @@
   Py_INCREF(&lxcXCFunctionalType);
 
 #ifdef GPAW_WITH_HDF5 
-  init_hdf5(); 
+  init_gpaw_hdf5(); 
 #endif 
   import_array1(-1);
   MPI_Barrier(MPI_COMM_WORLD);
Index: c/hdf5.c
===================================================================
--- c/hdf5.c	(revision 11461)
+++ c/hdf5.c	(working copy)
@@ -672,9 +672,9 @@
   {0, 0, 0, 0}
 };
 
-PyMODINIT_FUNC init_hdf5(void) 
+PyMODINIT_FUNC init_gpaw_hdf5(void) 
 { 
-  PyObject *m = Py_InitModule("_hdf5",functions); 
+  PyObject *m = Py_InitModule("_gpaw_hdf5",functions); 
   // Set some hdf5 constants as attributes
   PyModule_AddIntConstant(m, "H5T_FLOAT", H5T_FLOAT);
   PyModule_AddIntConstant(m, "H5T_INTEGER", H5T_INTEGER);
Index: gpaw/io/hdf5_highlevel.py
===================================================================
--- gpaw/io/hdf5_highlevel.py	(revision 11461)
+++ gpaw/io/hdf5_highlevel.py	(working copy)
@@ -7,7 +7,7 @@
 # h5py code is used directly except where explicitly noted
 
 import numpy as np
-from _hdf5 import *
+from _gpaw_hdf5 import *
 
 def numpy_type_from_h5(datatype):
     """Simple conversion from HDF5 datatype to NumPy dtype"""
Index: gpaw/test/Al2_lrtddft.py
===================================================================
--- gpaw/test/Al2_lrtddft.py	(revision 11461)
+++ gpaw/test/Al2_lrtddft.py	(working copy)
@@ -11,7 +11,7 @@
 use_hdf5 = True
 
 try:
-    import _hdf5
+    import _gpaw_hdf5
     restart_file = 'Al2_gs.hdf5'
 except ImportError:
     restart_file = 'Al2_gs.gpw'
Index: gpaw/test/__init__.py
===================================================================
--- gpaw/test/__init__.py	(revision 11461)
+++ gpaw/test/__init__.py	(working copy)
@@ -520,7 +520,7 @@
             raise
         except ImportError, ex:
             module = ex.args[0].split()[-1].split('.')[0]
-            if module in ['scipy', 'cmr', '_hdf5']:
+            if module in ['scipy', 'cmr', '_gpaw_hdf5']:
                 skip = True
             else:
                 failed = True
Index: gpaw/test/fermilevel.py
===================================================================
--- gpaw/test/fermilevel.py	(revision 11461)
+++ gpaw/test/fermilevel.py	(working copy)
@@ -6,7 +6,7 @@
 
 modes = ['gpw']
 try:
-    import _hdf5
+    import _gpaw_hdf5
     modes.append('hdf5')
 except ImportError:
     pass
Index: gpaw/test/fermisplit.py
===================================================================
--- gpaw/test/fermisplit.py	(revision 11461)
+++ gpaw/test/fermisplit.py	(working copy)
@@ -10,7 +10,7 @@
 
 modes = ['gpw']
 try:
-    import _hdf5
+    import _gpaw_hdf5
     modes.append('hdf5')
 except ImportError:
     pass
Index: gpaw/test/fileio/file_reference.py
===================================================================
--- gpaw/test/fileio/file_reference.py	(revision 11461)
+++ gpaw/test/fileio/file_reference.py	(working copy)
@@ -10,7 +10,7 @@
 
 modes = ['gpw']
 try:
-    import _hdf5
+    import _gpaw_hdf5
     modes.append('hdf5')
 except ImportError:
     pass
Index: gpaw/test/fileio/parallel.py
===================================================================
--- gpaw/test/fileio/parallel.py	(revision 11461)
+++ gpaw/test/fileio/parallel.py	(working copy)
@@ -6,7 +6,7 @@
 
 modes = ['gpw']
 try:
-    import _hdf5
+    import _gpaw_hdf5
     modes.append('hdf5')
 except ImportError:
     pass
Index: gpaw/test/fileio/restart_density.py
===================================================================
--- gpaw/test/fileio/restart_density.py	(revision 11461)
+++ gpaw/test/fileio/restart_density.py	(working copy)
@@ -7,7 +7,7 @@
 
 modes = ['gpw']
 try:
-    import _hdf5
+    import _gpaw_hdf5
     modes.append('hdf5')
 except ImportError:
     pass
Index: gpaw/test/refine.py
===================================================================
--- gpaw/test/refine.py	(revision 11461)
+++ gpaw/test/refine.py	(working copy)
@@ -8,7 +8,7 @@
 ##endings = ['nc']
 endings = ['gpw']
 try:
-    import _hdf5
+    import _gpaw_hdf5
     endings.append('hdf5')
 except ImportError:
     pass
Index: gpaw/test/restart.py
===================================================================
--- gpaw/test/restart.py	(revision 11461)
+++ gpaw/test/restart.py	(working copy)
@@ -7,7 +7,7 @@
 
 modes = ['gpw']
 try:
-    import _hdf5
+    import _gpaw_hdf5
     modes.append('hdf5')
 except ImportError:
     pass
Index: setup.py
===================================================================
--- setup.py	(revision 11461)
+++ setup.py	(working copy)
@@ -209,7 +209,7 @@
     get_hdf5_config(define_macros)
     msg.append('* Compiling with HDF5')
 
-    hdf5_extension = Extension('_hdf5',
+    hdf5_extension = Extension('_gpaw_hdf5',
                                hdf5_sources,
                                libraries=libraries,
                                library_dirs=library_dirs,