Put \ifx guards on most other package includes, too.

[mjotex.git] / mjo-font.tex

diff --git a/mjo-font.tex b/mjo-font.tex
index c6675f3bc8b93058c489ab0eafcc04962adcf0e1..2a00a29ff34c9f3a6db57b1413d0646afaf05aa9 100644 (file)
--- a/mjo-font.tex
+++ b/mjo-font.tex
@@ -13,7 +13,8 @@
 \usepackage[utf8]{inputenc}
 
 % Grab the AMS fonts, too, for things like \mathbb.
-\usepackage{amsfonts}
-
+\ifx\mathbb\undefined
+  \usepackage{amsfonts}
+\fi
 
 \fi