diff --git a/doc/doxygen.conf b/doc/doxygen.conf
index b4d10dab9..1460ba842 100644
--- a/doc/doxygen.conf
+++ b/doc/doxygen.conf
@@ -846,7 +846,7 @@ PAPER_TYPE             = a4wide
 # The EXTRA_PACKAGES tag can be to specify one or more names of LaTeX 
 # packages that should be included in the LaTeX output.
 
-EXTRA_PACKAGES         = 
+EXTRA_PACKAGES         = amsmath
 
 # The LATEX_HEADER tag can be used to specify a personal LaTeX header for 
 # the generated latex document. The header should contain everything until