diff --git a/llvm/tools/gccas/gccas.sh b/llvm/tools/gccas/gccas.sh
index 05b0ac12f3d4..258d9604810a 100644
--- a/llvm/tools/gccas/gccas.sh
+++ b/llvm/tools/gccas/gccas.sh
@@ -18,6 +18,7 @@
 # 
 ##===----------------------------------------------------------------------===##
 #
+echo "gccas: This tool is deprecated, please use opt" 1>&2
 TOOLDIR=@TOOLDIR@
 OPTOPTS="-std-compile-opts -f"
 ASOPTS=""