Allow theming to be disabled (eg for old terminals)
 * Only load a theme file if `bobby` has been set
 * Only alter `PS1` if `\[\]\[$(scm_char)\]\[\]\[$(scm_prompt_info)\]\[\]\[$(rvm_version_prompt)\] \[\]\h \[\]in \[\]\w \[\]\[\n\[\]→\[\] ` has a value
diff --git a/bash_it.sh b/bash_it.sh
index f0c850c..60bef80 100644
--- a/bash_it.sh
+++ b/bash_it.sh
@@ -47,8 +47,9 @@
 
 
 unset config_file
-export PS1=$PROMPT
-
+if [[ $PROMPT ]]; then
+    export PS1=$PROMPT
+fi
 
 # Adding Support for other OSes
 PREVIEW="less"
diff --git a/lib/appearance.bash b/lib/appearance.bash
index 4b1f568..f723511 100644
--- a/lib/appearance.bash
+++ b/lib/appearance.bash
@@ -8,4 +8,6 @@
 export LSCOLORS='Gxfxcxdxdxegedabagacad'
 
 # Load the theme
-source "$BASH/themes/$BASH_THEME/$BASH_THEME.theme.bash"
\ No newline at end of file
+if [[ $BASH_THEME ]]; then
+    source "$BASH/themes/$BASH_THEME/$BASH_THEME.theme.bash"
+fi
\ No newline at end of file