diff --git a/roles/bash/files/profile b/roles/bash/files/profile
index e972eab..889a3d3 100644
--- a/roles/bash/files/profile
+++ b/roles/bash/files/profile
@@ -239,23 +239,15 @@ alias dark='_update_colors dark'
 # In tmux, OSC sequences can be forwarded to the underlying terminal by:
 #   * Wrapping the sequence with `DCS tmux; <sequence> ST`
 #   * Replacing ESC in <sequence> with ESC ESC.
-_osc_start() {
-    if [ -n "$TMUX" ]; then
-        printf "\ePtmux;\e\e]"
-    else
-        printf "\e]"
-    fi
-}
-
 # Either ST or BEL (\a) can be used to end an OSC sequence. However, tmux
 # requires ST to end its wrapping DCS.
-_osc_end() {
-    if [ -n "$TMUX" ]; then
-        printf "\a\e\x5c"       # 0x5c == backslash
-    else
-        printf "\a"
-    fi
-}
+if [ -n "$TMUX" ]; then
+    _OSC=$(printf "\ePtmux;\e\e]")
+    _ST=$(printf "\a\e\\")
+else
+    _OSC=$(printf "\e]")
+    _ST=$(printf "\a")
+fi
 
 _update_colors() {
     export BACKGROUND="$1"
@@ -294,9 +286,7 @@ _set_iterm2_colors() {    # 1: foreground, 2: background, 3: cursor
     local fg="$1" bg="$2" cursor="$3"
     local key rgb
     while read -r key rgb; do
-        _osc_start
-        printf "1337;SetColors=%s=%s" "$key" "${rgb}"
-        _osc_end
+        printf "%s1337;SetColors=%s=%s%s" "$_OSC" "$key" "${rgb}" "$_ST"
     done <<EOL
         black       $Base02_RGB
         red         $Red_RGB
@@ -323,9 +313,7 @@ _set_iterm2_colors() {    # 1: foreground, 2: background, 3: cursor
         curbg       $cursor
         link        $Cyan_RGB
 EOL
-    _osc_start
-    printf "1337;CursorShape=2"     # set cursor shape to underline
-    _osc_end
+    printf "%s1337;CursorShape=2%s" "$_OSC" "$_ST"  # set cursor shape to underline
 }
 
 # Documentation for xterm at https://www.xfree86.org/4.8.0/ctlseqs.html
@@ -338,9 +326,7 @@ _set_xterm_colors() {    # $1 foreground, $2 background, $3 cursor
         # where Ps   -> 4;c;spec
         #       c    -> index of the ANSI color to change [0..15]
         #       spec -> RGB value of color as rgb:RR/GG/BB
-        _osc_start
-        printf "4;%s;rgb:%s/%s/%s" "$c" "${rgb:0:2}"  "${rgb:2:2}" "${rgb:4:2}"
-        _osc_end
+        printf "%s4;%s;rgb:%s/%s/%s%s" "$_OSC" "$c" "${rgb:0:2}"  "${rgb:2:2}" "${rgb:4:2}" "$_ST"
     done <<EOL
         0  $Base02_RGB
         1  $Red_RGB
@@ -363,9 +349,7 @@ EOL
         # Send sequence OSC Ps ; Pt BEL
         # where Ps -> foreground (10), background (11), or cursor (12)
         #       Pt -> RGB value of color as rgb:RR/GG/BB
-        _osc_start
-        printf "%s;rgb:%s/%s/%s" "$Ps" "${rgb:0:2}"  "${rgb:2:2}" "${rgb:4:2}"
-        _osc_end
+        printf "%s%s;rgb:%s/%s/%s%s" "$_OSC" "$Ps" "${rgb:0:2}"  "${rgb:2:2}" "${rgb:4:2}" "$_ST"
     done <<EOL
         10 $fg
         11 $bg