diff --git a/first/first b/first/first
index ea48f0e87..1cf699e6a 100755
--- a/first/first
+++ b/first/first
@@ -269,7 +269,7 @@ ABC
 	( cd ..
 	  cp Action Action.orig
 	  ed - Action <<ABC
-/EM interpreter in C/,/^end/s/^/!/
+/EM interpreter in C/;/^end/s/^/!/
 w
 q
 ABC