diff --git a/src/arch/sparc64/Mir.zig b/src/arch/sparc64/Mir.zig
index a040af60c46312e16036fb633f54b5baa30c4c0c..744bd849432a577e11f7ebf68f4520a2073f8459 100644
--- a/src/arch/sparc64/Mir.zig
+++ b/src/arch/sparc64/Mir.zig
@@ -218,7 +218,7 @@ pub const Inst = struct {
         /// Used by e.g. call
         branch_link: struct {
             inst: Index,
-            link: Register = .o7,
+            // link is always %o7
         },
 
         /// Branch with prediction, checking the integer status code