diff --git a/config/battleBack.txt b/config/battleBack.txt
index ac28224e1..a2deb4963 100644
--- a/config/battleBack.txt
+++ b/config/battleBack.txt
@@ -2,7 +2,7 @@
 1 CMBKDES.BMP
 2 CMBKGRMT.BMP CMBKGRTR.BMP
 2 CMBKSNMT.BMP CMBKSNTR.BMP
-1 CMBKSWMP
+1 CMBKSWMP.BMP
 2 CMBKPGH.BMP CMBKRK.BMP
 1 CMBKSUB.BMP
 1 CMBKLAVA.BMP