diff --git a/src/util/format/u_format_parse.py b/src/util/format/u_format_parse.py
index 395376d0e5e..2a5edab0461 100644
--- a/src/util/format/u_format_parse.py
+++ b/src/util/format/u_format_parse.py
@@ -136,7 +136,7 @@ class Format:
             self.be_swizzles = le_swizzles
 
         be_shift = 0
-        for channel in self.be_channels[3::-1]:
+        for channel in reversed(self.be_channels):
             channel.shift = be_shift
             be_shift += channel.size