diff --git a/rc/bashrc b/rc/bashrc
index 5c4e4349..3800bc23 100755
--- a/rc/bashrc
+++ b/rc/bashrc
@@ -691,6 +691,7 @@ fi
 alias firefox="\firefox --ProfileManager"
 alias ff=firefox
 alias ff6=firefox
+alias thunderbird="\thunderbird --ProfileManager"
 
 # Allow custom aliases to be put in .aliases or .bash_aliases .
 
diff --git a/rc/zshrc b/rc/zshrc
index b9c485c9..3a479f67 100755
--- a/rc/zshrc
+++ b/rc/zshrc
@@ -678,6 +678,7 @@ fi
 alias firefox="\firefox --ProfileManager"
 alias ff=firefox
 alias ff6=firefox
+alias thunderbird="\thunderbird --ProfileManager"
 
 # Allow custom aliases to be put in .aliases or .zsh_aliases .