diff --git a/install-sh b/install-sh
index 58719246..956817d4 100755
--- a/install-sh
+++ b/install-sh
@@ -208,7 +208,7 @@ else
 
 # Make a temp file name in the proper directory.
 
-	dsttmp=$dstdir/#inst.$$#
+	dsttmp=$dstdir/_inst.$$_
 
 # Move or copy the file name to the temp name