diff --git a/.gitignore b/.gitignore
index 32e62de..25042cb 100644
--- a/.gitignore
+++ b/.gitignore
@@ -7,3 +7,4 @@
 lib/custom.bash
 plugins/custom.plugins.bash
 *.swp
+.*.un~
diff --git a/themes/base.theme.bash b/themes/base.theme.bash
index 15bd4aa..f096fda 100644
--- a/themes/base.theme.bash
+++ b/themes/base.theme.bash
@@ -31,7 +31,7 @@
 RBFU_THEME_PROMPT_SUFFIX='|'
 
 function scm {
-  if [[ -d .git ]]; then SCM=$SCM_GIT
+  if [[ -f .git/HEAD ]]; then SCM=$SCM_GIT
   elif [[ -n "$(git symbolic-ref HEAD 2> /dev/null)" ]]; then SCM=$SCM_GIT
   elif [[ -d .hg ]]; then SCM=$SCM_HG
   elif [[ -n "$(hg root 2> /dev/null)" ]]; then SCM=$SCM_HG