diff --git a/src/elogd.cxx b/src/elogd.cxx
index a1c2620a..43649424 100755
--- a/src/elogd.cxx
+++ b/src/elogd.cxx
@@ -28555,6 +28555,10 @@ void decode_post(char *logbook, LOGBOOK *lbs, char *string, const char *boundary
                      show_error(str);
                      return;
                   }
+                  /* replace non-ASCII characters */
+                  for (int i=0 ; i<strlen(file_name) ; i++)
+                     if (file_name[i] < ' ' || file_name[i] > 'z')
+                        file_name[i] = '_';
                }
 
                /* find next boundary */