diff --git a/fake_home/.shell_aliases b/fake_home/.shell_aliases
index 0c18432..8deb8c2 100755
--- a/fake_home/.shell_aliases
+++ b/fake_home/.shell_aliases
@@ -18,6 +18,10 @@ function helpdef {
     return 1
 }
 
+function wait-for {
+    while ! $@; do sleep 1; done
+}
+
 function slides() {
     OLD_PATH="$PATH"
     PATH="$HOME/.slides-bin:$PATH"