--- /usr/lib/portage/pym/output.py	
+++ /usr/lib/portage/pym/output.py
@@ -99,9 +99,10 @@
 		if (myt in legal_terms) or myt.startswith("xterm") or myt.startswith("screen"):
 			sys.stderr.write("\x1b]2;"+str(mystr)+"\x07")
 			sys.stderr.flush()
-		if (myt.startswith("screen")):
-			sys.stderr.write("\x1bk"+str(mystr)+"\x1b\\")
-			sys.stderr.flush()
+		if (os.environ.has_key("SCREEN_PORTAGE")):
+			if (myt.startswith("screen") and os.environ["SCREEN_PORTAGE"] == "set_title"):
+				sys.stderr.write("\x1bk"+str(mystr)+"\x1b\\")
+				sys.stderr.flush()
 
 def xtermTitleReset():
 	if havecolor and dotitles and os.environ.has_key("TERM"):