diff --git a/bin/autojump.bash b/bin/autojump.bash
index 17c51f9..2ba606e 100644
--- a/bin/autojump.bash
+++ b/bin/autojump.bash
@@ -1,4 +1,4 @@
-if [[ -z $AUTOJUMP_SOURCED ]]; then
+if [[ "$(type -t j)" != "function" ]]; then
   export AUTOJUMP_SOURCED=1
 
   # Script include