diff --git a/bin/cc-and-mkdep.ack b/bin/cc-and-mkdep.ack
index ec6fca220..fc9e04949 100755
--- a/bin/cc-and-mkdep.ack
+++ b/bin/cc-and-mkdep.ack
@@ -4,4 +4,4 @@
 : dependencies must be produced. This version is for ACK.
 n=$1
 shift
-exec $CC -Rcem-d$n -Rcem-m $*
+exec $CC -Rcem-A$n -Rcem-m $*