1 files changed, 2 insertions, 2 deletions

diff --git a/twopane.bash b/twopane.bash
index 2a3c9ad..c4cc027 100755
--- a/twopane.bash
+++ b/twopane.bash
@@ -1,9 +1,9 @@
 #!/bin/bash
+BASH_ARGV0=twopane.bash
 set -e
 set -f
 set -o pipefail
 shopt -s lastpipe
-PROGNAME=${0##*/}
 
 BOT_SIZE=8
 BOT_TITLE=input
@@ -29,7 +29,7 @@ STY=twopane.${TWOPANE##*/}
 
 save_file()
 {
-        cat > "$TWOPANE"/"${1:?$PROGNAME: Error: filename cannot be empty string}"
+        cat > "$TWOPANE"/"${1:?$0: Error: filename cannot be empty string}"
 }
 save_screenrc()
 {