--- a/src/openvpn/syshead.h
+++ b/src/openvpn/syshead.h
@@ -602,9 +602,7 @@ socket_defined (const socket_descriptor_
 /*
  * Should we include OCC (options consistency check) code?
  */
-#ifndef ENABLE_SMALL
 #define ENABLE_OCC
-#endif
 
 /*
  * Should we include NTLM proxy functionality
