diff --git a/gas/ChangeLog b/gas/ChangeLog
index 08e9a22d0f..2e65ebcdfa 100644
--- a/gas/ChangeLog
+++ b/gas/ChangeLog
@@ -1,3 +1,8 @@
+2000-08-16  Nick Clifton  <nickc@redhat.com>
+
+	* config/tc-arm.c (do_bx): Warn about "bx px" not being veryu
+	useful.
+
 2000-08-14  Will Cohen  <wcohen@redhat.com>
 
 	* config/tc-sh.h (DWARF2_LINE_MIN_INSN_LENGTH): Defined.
diff --git a/gas/config/tc-arm.c b/gas/config/tc-arm.c
index e9bdc33dc0..5ca0815288 100644
--- a/gas/config/tc-arm.c
+++ b/gas/config/tc-arm.c
@@ -3590,6 +3590,8 @@ do_bx (str, flags)
     }
 
   /* Note - it is not illegal to do a "bx pc".  Useless, but not illegal.  */
+  if (reg == REG_PC)
+    as_tsktsk (_("Use of r15 in bx in ARM mode is not really useful"));
 
   end_of_line (str);
 }