diff --git a/Lib/irix5/AL.py b/Lib/irix5/AL.py
index c4497ab..ed17cde 100755
--- a/Lib/irix5/AL.py
+++ b/Lib/irix5/AL.py
@@ -17,6 +17,7 @@
 
 MONO		= 1
 STEREO		= 2
+QUADRO		= 4			# 4CHANNEL is not a legal Python name
 
 INPUT_LINE	= 0
 INPUT_MIC	= 1
diff --git a/Lib/plat-irix5/AL.py b/Lib/plat-irix5/AL.py
index c4497ab..ed17cde 100755
--- a/Lib/plat-irix5/AL.py
+++ b/Lib/plat-irix5/AL.py
@@ -17,6 +17,7 @@
 
 MONO		= 1
 STEREO		= 2
+QUADRO		= 4			# 4CHANNEL is not a legal Python name
 
 INPUT_LINE	= 0
 INPUT_MIC	= 1