diff --git a/src/arch/sparc64/CodeGen.zig b/src/arch/sparc64/CodeGen.zig
index ff27ca003d..cd79969b25 100644
--- a/src/arch/sparc64/CodeGen.zig
+++ b/src/arch/sparc64/CodeGen.zig
@@ -1808,6 +1808,34 @@ fn genTypedValue(self: *Self, typed_value: TypedValue) InnerError!MCValue {
                 return self.fail("TODO implement int genTypedValue of > 64 bits", .{});
             }
         },
+        .ErrorSet => {
+            const err_name = typed_value.val.castTag(.@"error").?.data.name;
+            const module = self.bin_file.options.module.?;
+            const global_error_set = module.global_error_set;
+            const error_index = global_error_set.get(err_name).?;
+            return MCValue{ .immediate = error_index };
+        },
+        .ErrorUnion => {
+            const error_type = typed_value.ty.errorUnionSet();
+            const payload_type = typed_value.ty.errorUnionPayload();
+
+            if (typed_value.val.castTag(.eu_payload)) |pl| {
+                if (!payload_type.hasRuntimeBits()) {
+                    // We use the error type directly as the type.
+                    return MCValue{ .immediate = 0 };
+                }
+
+                _ = pl;
+                return self.fail("TODO implement error union const of type '{}' (non-error)", .{typed_value.ty.fmtDebug()});
+            } else {
+                if (!payload_type.hasRuntimeBits()) {
+                    // We use the error type directly as the type.
+                    return self.genTypedValue(.{ .ty = error_type, .val = typed_value.val });
+                }
+
+                return self.fail("TODO implement error union const of type '{}' (error)", .{typed_value.ty.fmtDebug()});
+            }
+        },
         .ComptimeInt => unreachable, // semantic analysis prevents this
         .ComptimeFloat => unreachable, // semantic analysis prevents this
         else => return self.fail("TODO implement const of type '{}'", .{typed_value.ty.fmtDebug()}),