diff --git a/docs/examples/ruletypes.yml b/docs/examples/ruletypes.yml
index 8bc0fe8..974988d 100644
--- a/docs/examples/ruletypes.yml
+++ b/docs/examples/ruletypes.yml
@@ -63,7 +63,7 @@ rules:
       device: flightstick
       axis: X
       inverted: true # the lower half of the axis will often need to be inverted
-    input_uppper:
+    input_upper:
       device: flightstick
       axis: RX
     output:
@@ -146,4 +146,4 @@ rules:
           end: 500
     output:
       device: mouse
-      button: REL_WHEEL
\ No newline at end of file
+      button: REL_WHEEL