diff --git a/themes/barbuk/barbuk.theme.bash b/themes/barbuk/barbuk.theme.bash
index 89014b1b..c864f856 100644
--- a/themes/barbuk/barbuk.theme.bash
+++ b/themes/barbuk/barbuk.theme.bash
@@ -68,9 +68,11 @@ function _exit-code {
 }
 
 function _prompt {
-    local exit_code="$?" wrap_char=' ' dir_color=$green ssh_info='' python_venv='' host command_duration
+    local exit_code="$?" wrap_char=' ' dir_color=$green ssh_info='' python_venv='' host command_duration=
 
-    command_duration=$(_command_duration)
+    if _command_exists _command_duration; then
+        command_duration=$(_command_duration)
+    fi
 
     _exit-code exit_code
     _git-uptream-remote-logo