diff --git a/include/wx/features.h b/include/wx/features.h
index fec65015ba..1c39ea05d4 100644
--- a/include/wx/features.h
+++ b/include/wx/features.h
@@ -58,6 +58,10 @@
 
 /*  wxRE_ADVANCED is not always available, depending on regex library used
  *  (it's unavailable only if compiling via configure against system library) */
+#ifdef __INNOTEK_LIBC__
+    #define WX_NO_REGEX_ADVANCED
+#endif
+
 #ifndef WX_NO_REGEX_ADVANCED
     #define wxHAS_REGEX_ADVANCED
 #else
diff --git a/include/wx/platform.h b/include/wx/platform.h
index 586e483781..9cb9554af7 100644
--- a/include/wx/platform.h
+++ b/include/wx/platform.h
@@ -209,6 +209,9 @@
 
 #    ifdef __EMX__
 #        define OS2EMX_PLAIN_CHAR
+#      ifdef __INNOTEK_LIBC__
+#        define wxSIZE_T_IS_UINT
+#      endif
 #    endif
 
     /* define __HPUX__ for HP-UX where standard macro is __hpux */