diff --git a/homeassistant/components/somfy/cover.py b/homeassistant/components/somfy/cover.py
index 5eabe7ee07a..b48e326162d 100644
--- a/homeassistant/components/somfy/cover.py
+++ b/homeassistant/components/somfy/cover.py
@@ -91,15 +91,15 @@ class SomfyCover(SomfyEntity, CoverDevice):
 
     def set_cover_tilt_position(self, **kwargs):
         """Move the cover tilt to a specific position."""
-        self.cover.orientation = kwargs[ATTR_TILT_POSITION]
+        self.cover.orientation = 100 - kwargs[ATTR_TILT_POSITION]
 
     def open_cover_tilt(self, **kwargs):
         """Open the cover tilt."""
-        self.cover.orientation = 100
+        self.cover.orientation = 0
 
     def close_cover_tilt(self, **kwargs):
         """Close the cover tilt."""
-        self.cover.orientation = 0
+        self.cover.orientation = 100
 
     def stop_cover_tilt(self, **kwargs):
         """Stop the cover."""