diff --git a/src/include/port/sco.h b/src/include/port/sco.h
index 30db00386fd..1927686dfe1 100644
--- a/src/include/port/sco.h
+++ b/src/include/port/sco.h
@@ -3,3 +3,5 @@
 #define MAXPATHLEN		_POSIX_PATH_MAX
 
 #define NOFILE			NOFILES_MIN
+
+#define DISABLE_COMPLEX_MACRO