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diff --git a/src/c.pyx b/src/c.pyx
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+++ b/src/c.pyx
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+# -*- python -*-
+'''
+pylibgamma — Python 3 wrapper for libgamma
+Copyright © 2014  Mattias Andrée (maandree@member.fsf.org)
+
+This library is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+This library is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this library.  If not, see <http://www.gnu.org/licenses/>.
+'''
+
+cimport cython
+
+from libc.string cimport strerror as c_strerror
+
+
+def strerror(error : int) -> str:
+    '''
+    Get a textual description of an error.
+    
+    @param   error  The number of the error.
+    @return         The description of the error.
+    '''
+    cdef const char* text
+    cdef bytes bs
+    text = c_strerror(<int>error)
+    bs = text
+    return bs.decode('utf-8', 'strict')
+