diff --git a/doc/concepts/imp b/doc/concepts/imp
index 27d9ab9..5ac1259 100644
--- a/doc/concepts/imp
+++ b/doc/concepts/imp
@@ -3,7 +3,7 @@
 
 LAST UPDATED
         Deepthought, 10-Nov-92
-        Pepel,             18-Nov-93
+        Pepel, 18-Nov-93
 
 DESRIPTION
         This document describes IMP, the intermud message protocol,
@@ -13,8 +13,8 @@
         (unreliable datagram protocol) packets. Each mud provides
         a connection endpoint which is given by the ip host address
         and the UDP port number. Muds may then send messages to
-        this port by using the efun send_udp(). The applied function
-        receive_udp will be called by the driver in the master
+        this port by using the efun send_imp(). The applied function
+        receive_imp will be called by the driver in the master
         object if a imp message arrives at the mud's UDP port.
 
         Imp message packets have the following format:
@@ -48,8 +48,8 @@
 
 NOTE
         The above is only particularly correct nowadays. Recently a
-        package name ``inetd'' was published, that is based on the IMP
-        mechanism in the driver (send_udp() and receive_udp()), but
+        package name "inetd" was published, that is based on the IMP
+        mechanism in the driver (send_imp() and receive_imp()), but
         it uses a different message format. That package seems to
         enjoy much publicity and is installed in a number of muds. For
         details look into the inetd description.
@@ -60,4 +60,4 @@
         the connection to other muds.
 
 SEE ALSO
-        send_udp(E), receive_udp(M), intermud(C)
+        send_imp(E), receive_imp(M), intermud(C)