diff --git a/lang/cem/cemcom/l_em.h b/lang/cem/cemcom/l_em.h
index f59e21876..c8bbb4c1e 100644
--- a/lang/cem/cemcom/l_em.h
+++ b/lang/cem/cemcom/l_em.h
@@ -72,4 +72,5 @@
 #define	C_ms_gto()
 #define	C_ms_par(b)
 #define	C_ms_reg(o,s,t,c)
+#define	C_ms_err()