diff --git a/Doxyfile b/Doxyfile
index 88735c3e1..54e5ba71f 100644
--- a/Doxyfile
+++ b/Doxyfile
@@ -1190,7 +1190,7 @@ EXT_LINKS_IN_WINDOW    = NO
 # to manually remove any form_*.png images from the HTML output directory
 # to force them to be regenerated.
 
-FORMULA_FONTSIZE       = 10
+FORMULA_FONTSIZE       = 12
 
 # Use the FORMULA_TRANPARENT tag to determine whether or not the images
 # generated for formulas are transparent PNGs. Transparent PNGs are