diff --git a/ocrloader.py b/ocrloader.py
index b34ebc4..5556304 100644
--- a/ocrloader.py
+++ b/ocrloader.py
@@ -41,8 +41,10 @@ def process(cfg, filename, payload, enable_ocr=True):
         os.write(fd, payload)
         os.close(fd)
         print >> sys.stderr, '  running OCR on file'
-        os.system('abbyyocr9 -rl French -if %s -f PDF -pem ImageOnText -pfpr 150 -pfq 100 -of %s' % \
-                        (tmpfilename, ocr_filename))
+        subprocess.call(['/opt/ABBYYOCR9/abbyyocr9',
+                         '-rl', 'French', '-if', tmpfilename,
+                         '-f', 'PDF', '-pem', 'ImageOnText', '-pfpr', '150',
+                         '-pfq', '100', '-of', ocr_filename])
         if not os.path.exists(ocr_filename):
             print >> sys.stderr, 'failed to OCR %s' % filename
             file('/tmp/' + filename, 'w').write(payload) # keep it for inspection