diff --git a/openerp/addons/base/res/res_font.py b/openerp/addons/base/res/res_font.py
index 306a8944783..47e49bf4d39 100644
--- a/openerp/addons/base/res/res_font.py
+++ b/openerp/addons/base/res/res_font.py
@@ -81,6 +81,15 @@ class res_font(osv.Model):
                 font = ttfonts.TTFontFile(font_path)
                 _logger.debug("Found font %s at %s", font.name, font_path)
                 found_fonts.append((font.familyName, font.name, font_path, font.styleName))
+            except KeyError, ex:
+                if ex.args and ex.args[0] == 'head':
+                    # Sometimes, the system can have a lot of Bitmap fonts, and
+                    # in this case, Reportlab can't load the 'head' table from
+                    # the structure of the TTF file (ex: NISC18030.ttf)
+                    # In this case, we have to bypass the loading of this font!
+                    _logger.warning("Could not register Fond %s (Old Bitmap font)", font_path)
+                else:
+                    raise
             except ttfonts.TTFError:
                 _logger.warning("Could not register Font %s", font_path)
 
@@ -112,4 +121,4 @@ class res_font(osv.Model):
     def clear_caches(self):
         """Force worker to resync at next report loading by setting an empty font list"""
         customfonts.CustomTTFonts = []
-        return super(res_font, self).clear_caches()
\ No newline at end of file
+        return super(res_font, self).clear_caches()