diff --git a/R/object-from-call.R b/R/object-from-call.R
index dc4d5955..8bde28ae 100644
--- a/R/object-from-call.R
+++ b/R/object-from-call.R
@@ -289,6 +289,10 @@ s7_class_name <- function(cls, block) {
     unlist(lapply(cls$classes, s7_class_name, block = block))
   } else if (inherits(cls, "S7_S3_class")) {
     cls$class
+  } else if (inherits(cls, "S7_any")) {
+    "any"
+  } else if (inherits(cls, "S7_missing")) {
+    "missing"
   } else {
     warn_roxy_block(block, "Unknown S7 class type")
     paste0(deparse(cls), collapse = " ")
diff --git a/tests/testthat/test-object-from-call.R b/tests/testthat/test-object-from-call.R
index b10ec09d..253b97d6 100644
--- a/tests/testthat/test-object-from-call.R
+++ b/tests/testthat/test-object-from-call.R
@@ -327,6 +327,13 @@ test_that("S7 method on S3 generic includes package prefix in class name", {
   expect_equal(obj$value$generic, "print")
 })
 
+test_that("S7 method with special classes any and missing", {
+  skip_unless_r(">= 4.3.0")
+  block <- roxy_block(tags = list(), file = "test.R", line = 1, call = quote(x))
+  expect_equal(s7_class_name(S7::class_any, block), "any")
+  expect_equal(s7_class_name(S7::class_missing, block), "missing")
+})
+
 test_that("S7 method with unknown class type warns", {
   skip_unless_r(">= 4.3.0")
   block <- roxy_block(tags = list(), file = "test.R", line = 1, call = quote(x))