diff --git a/themes/prose.zsh-theme b/themes/prose.zsh-theme
index 9ade9e573..8f7f75943 100644
--- a/themes/prose.zsh-theme
+++ b/themes/prose.zsh-theme
@@ -1,9 +1,13 @@
+if [ "x$OH_MY_ZSH_HG" = "x" ]; then
+    OH_MY_ZSH_HG="hg"
+fi
+
 function virtualenv_info {
     [ $VIRTUAL_ENV ] && echo '('`basename $VIRTUAL_ENV`') '
 }
 
 function hg_prompt_info {
-    hg prompt --angle-brackets "\
+    $OH_MY_ZSH_HG prompt --angle-brackets "\
 < on %{$fg[magenta]%}<branch>%{$reset_color%}>\
 < at %{$fg[yellow]%}<tags|%{$reset_color%}, %{$fg[yellow]%}>%{$reset_color%}>\
 %{$fg[green]%}<status|modified|unknown><update>%{$reset_color%}<