diff --git a/README.md b/README.md
index 16ac0de..a4c0ce5 100644
--- a/README.md
+++ b/README.md
@@ -224,7 +224,7 @@ Usage:  izapple2 [file]
   -s3 string
     	slot 3 configuration. (default "fastchip")
   -s4 string
-    	slot 4 configuration. (default "mouse")
+    	slot 4 configuration. (default "empty")
   -s5 string
     	slot 5 configuration. (default "empty")
   -s6 string
diff --git a/configs/2e.cfg b/configs/2e.cfg
index ad49532..e6a9456 100644
--- a/configs/2e.cfg
+++ b/configs/2e.cfg
@@ -6,5 +6,4 @@ charrom: <internal>/Apple IIe Video Unenhanced.bin
 s0: language
 s2: vidhd
 s3: fastchip
-s4: mouse
 s6: diskii,disk1=<internal>/dos33.dsk
\ No newline at end of file
diff --git a/configs/2enh.cfg b/configs/2enh.cfg
index 45e4bf7..4351f9f 100644
--- a/configs/2enh.cfg
+++ b/configs/2enh.cfg
@@ -9,5 +9,4 @@ nsc: main
 s0: language
 s2: vidhd
 s3: fastchip
-s4: mouse
 s6: diskii,disk1=<internal>/dos33.dsk
\ No newline at end of file
diff --git a/doc/usage.txt b/doc/usage.txt
index 8920073..e1aa8b1 100644
--- a/doc/usage.txt
+++ b/doc/usage.txt
@@ -32,7 +32,7 @@ Usage:  izapple2 [file]
   -s3 string
     	slot 3 configuration. (default "fastchip")
   -s4 string
-    	slot 4 configuration. (default "mouse")
+    	slot 4 configuration. (default "empty")
   -s5 string
     	slot 5 configuration. (default "empty")
   -s6 string