diff --git a/themes/base.theme.bash b/themes/base.theme.bash
index d14e42b..30fa539 100644
--- a/themes/base.theme.bash
+++ b/themes/base.theme.bash
@@ -22,6 +22,8 @@
 
 
 function rvm_version_prompt {
-  rvm=$(rvm tools identifier) || return
-  echo -e "$RVM_THEME_PROMPT_PREFIX$rvm$RVM_THEME_PROMPT_SUFFIX"
+  if which rvm &> /dev/null; then
+    rvm=$(rvm tools identifier) || return
+    echo -e "$RVM_THEME_PROMPT_PREFIX$rvm$RVM_THEME_PROMPT_SUFFIX"
+  fi
 }
\ No newline at end of file