diff --git a/doc/user/ChangeLog b/doc/user/ChangeLog
index efb574552d..f2aafa515f 100644
--- a/doc/user/ChangeLog
+++ b/doc/user/ChangeLog
@@ -1,3 +1,8 @@
+2002-03-27	Eric Norum <eric.norum@usask.ca>
+
+        * intr.t: Per PR165, now correctly states that passing a NULL 
+	pointer for the return argument is an error.
+
 2002-03-27	Ralf Corsepius <corsepiu@faw.uni-ulm.de>
 
 	* Makefile.am: Remove AUTOMAKE_OPTIONS.
diff --git a/doc/user/intr.t b/doc/user/intr.t
index a59e172758..e9efbbd0c8 100644
--- a/doc/user/intr.t
+++ b/doc/user/intr.t
@@ -273,7 +273,7 @@ procedure Interrupt_Catch (
 @subheading DIRECTIVE STATUS CODES:
 @code{@value{RPREFIX}SUCCESSFUL} - ISR established successfully@*
 @code{@value{RPREFIX}INVALID_NUMBER} - illegal vector number@*
-@code{@value{RPREFIX}INVALID_ADDRESS} - illegal ISR entry point or invalid old_isr_handler
+@code{@value{RPREFIX}INVALID_ADDRESS} - illegal ISR entry point or invalid @code{old_isr_handler}
 
 @subheading DESCRIPTION:
 
@@ -286,11 +286,6 @@ returned in @code{old_isr_handler}.
 To release an interrupt vector, pass the old handler's address obtained
 when the vector was first capture.
 
-@ifset is-C
-Passing a NULL pointer as the @code{old_handler} address and this parameter
-will be ignored.
-@end ifset
-
 @subheading NOTES:
 
 This directive will not cause the calling task to be preempted.