diff --git a/shell/bashrc b/shell/bashrc
index e2e0b0b..8eccb6d 100644
--- a/shell/bashrc
+++ b/shell/bashrc
@@ -204,10 +204,10 @@ DATE=$(/bin/date +%Y-%m-%d_%H:%M:%S.%N)
 local TMPFILE=tmp.${DATE}.sw
 mv "$1" $TMPFILE && mv "$2" "$1" && mv $TMPFILE $2
 }
-bf()
+bf ()
 {
-DATE=$(/bin/date +%Y-%m-%d_%H:%M:%S.%N)
-local TMPFILE=tmp.${DATE}.bak
+DATE=$(/bin/date +%Y-%m-%d_%H:%M:%S.%N);
+local TMPFILE=${1}.${DATE}.bak;
 /bin/cp "$1" $TMPFILE
 }
 fi