diff --git a/themes/base.theme.bash b/themes/base.theme.bash
index 509893e5..b3c81593 100644
--- a/themes/base.theme.bash
+++ b/themes/base.theme.bash
@@ -18,7 +18,7 @@ SCM_THEME_CURRENT_USER_SUFFIX=''
 
 CLOCK_CHAR='⌚'
 THEME_CLOCK_CHAR_COLOR=${THEME_CLOCK_CHAR_COLOR:="${red}"}
-THEME_SHOW_CLOCK=${THEME_CLOCK_CHECK:-true}
+[ -z $THEME_SHOW_CLOCK ] && THEME_SHOW_CLOCK=${THEME_CLOCK_CHECK:-true}
 THEME_CLOCK_FORMAT=${THEME_CLOCK_FORMAT:="%Y-%m-%d %H:%M:%S"}
 THEME_CLOCK_COLOR=${THEME_CLOCK_COLOR:="${bold_cyan}"}