diff --git a/src/regex/regexM8.xml b/src/regex/regexM8.xml
index 630ef5a328..81e3f14ac7 100644
--- a/src/regex/regexM8.xml
+++ b/src/regex/regexM8.xml
@@ -706,10 +706,6 @@
                     <SETTING><VALUE>WSPC</VALUE></SETTING>
                 </SETTING>
 
-                <!-- Settings for "OmnisRC Panel" panel -->
-                <SETTING><NAME>Defines</NAME><VALUE>ismac,isMacRCC</VALUE></SETTING>
-                <SETTING><NAME>Compatible</NAME><VALUE>false</VALUE></SETTING>
-
                 <!-- Settings for "Output Flags" panel -->
                 <SETTING><NAME>FileLocked</NAME><VALUE>false</VALUE></SETTING>
                 <SETTING><NAME>ResourcesMapIsReadOnly</NAME><VALUE>false</VALUE></SETTING>
@@ -1785,7 +1781,7 @@
                 <SETTING><NAME>MWFrontEnd_C_onlystdkeywords</NAME><VALUE>0</VALUE></SETTING>
                 <SETTING><NAME>MWFrontEnd_C_enumsalwaysint</NAME><VALUE>0</VALUE></SETTING>
                 <SETTING><NAME>MWFrontEnd_C_mpwpointerstyle</NAME><VALUE>0</VALUE></SETTING>
-                <SETTING><NAME>MWFrontEnd_C_prefixname</NAME><VALUE>wx/wx_cwc.h</VALUE></SETTING>
+                <SETTING><NAME>MWFrontEnd_C_prefixname</NAME><VALUE>wx_cwc.pch</VALUE></SETTING>
                 <SETTING><NAME>MWFrontEnd_C_ansistrict</NAME><VALUE>0</VALUE></SETTING>
                 <SETTING><NAME>MWFrontEnd_C_mpwcnewline</NAME><VALUE>0</VALUE></SETTING>
                 <SETTING><NAME>MWFrontEnd_C_wchar_type</NAME><VALUE>1</VALUE></SETTING>
@@ -1973,10 +1969,6 @@
                     <SETTING><VALUE>WSPC</VALUE></SETTING>
                 </SETTING>
 
-                <!-- Settings for "OmnisRC Panel" panel -->
-                <SETTING><NAME>Defines</NAME><VALUE>ismac,isMacRCC</VALUE></SETTING>
-                <SETTING><NAME>Compatible</NAME><VALUE>false</VALUE></SETTING>
-
                 <!-- Settings for "Output Flags" panel -->
                 <SETTING><NAME>FileLocked</NAME><VALUE>false</VALUE></SETTING>
                 <SETTING><NAME>ResourcesMapIsReadOnly</NAME><VALUE>false</VALUE></SETTING>