diff --git a/doc/doxygen/Doxylocal b/doc/doxygen/Doxylocal
index 5da2ac817be470e0fbc15584269572910c71bfb1..66757d5a83c78e814af2551793d7749dea6fb972 100644
--- a/doc/doxygen/Doxylocal
+++ b/doc/doxygen/Doxylocal
@@ -4,3 +4,5 @@ EXAMPLE_PATH           +=
 EXAMPLE_PATTERNS       +=
 IMAGE_PATH             +=
 PREDEFINED             += DOXYGEN 
+
+EXTRA_PACKAGES         = amsmath amssymb