diff --git a/lib/self-upgrade.bash b/lib/self-upgrade.bash
index 77b5326..8a9ea56 100644
--- a/lib/self-upgrade.bash
+++ b/lib/self-upgrade.bash
@@ -15,7 +15,7 @@ EOF
 
 function development_upgrade {
   [[ "$MIAOU_BASH_MODE_OWNER" != "$USER" ]] &&
-    >&2 echo "ERROR: development mode owned by: $MMIAOU_BASH_MODE_OWNER" &&
+    >&2 echo "ERROR: development mode owned by: $MIAOU_BASH_MODE_OWNER" &&
     builtin exit 11
 
   cd "$MIAOU_BASH_DIR"/ || return 12 # should not happen