diff --git a/util/ass/em_ass.6 b/util/ass/em_ass.6
index 567dca75d..7538cd6f4 100644
--- a/util/ass/em_ass.6
+++ b/util/ass/em_ass.6
@@ -43,7 +43,7 @@ These will only be loaded
 if they contain definitions of procedures or data imported by
 previously assembled modules.
 When \fIack\fP(1) is provided with the -LIB flag it tells the
-EM-optimizer \fIem_opt\fP(VI) to insert a library messages
+EM-optimizer \fIem_opt\fP(6) to insert a library messages
 when optimizing modules.
 The EM-archiver \fIarch\fP(1) can be used to create libraries
 from EM modules.