--- ./src/ListOfLatexCommands.cpp	2017-05-05 14:48:06.871667425 +0500
+++ ./src/ListOfLatexCommands.cpp	2017-05-05 14:48:58.775002136 +0500
@@ -544,7 +544,7 @@
                         }
                         else
                         {
-                            if (com_nr==5 && argument1[0]!='\0')//special case 'frac'
+                            if (com_nr==5 && argument1[0].toLatin1()!='\0')//special case 'frac'
                             {
                                 int count1,count2;//,max_count;
                                 count1=count2=0;