diff --git a/mathtranslate/process_latex.py b/mathtranslate/process_latex.py
index e2c0637..3d14b8a 100644
--- a/mathtranslate/process_latex.py
+++ b/mathtranslate/process_latex.py
@@ -492,8 +492,8 @@ def replace_function(match):
     return pattern.sub(replace_function, latex)
 
 def remove_incompatible_packages(text):
-    incompatible_list=['axessibility']
-    #axessibility is incompatible with xeCJK and can be removed savely
+    incompatible_list=['axessibility','fontenc']
+    #axessibility,fontenc is incompatible with xeCJK and can be removed savely
     #maybe more will be added
     for package in incompatible_list:
         pattern = re.compile(r'\\usepackage(\[[A-Za-z]*?\])?\{'+package+r'\}')