diff --git a/tools/versioner/src/versioner.cpp b/tools/versioner/src/versioner.cpp
index 473f1f9..99228dd 100644
--- a/tools/versioner/src/versioner.cpp
+++ b/tools/versioner/src/versioner.cpp
@@ -141,7 +141,7 @@
   }
 
   auto new_end = std::remove_if(headers.begin(), headers.end(), [&arch](llvm::StringRef header) {
-    for (const auto& it : header_blacklist) {
+    for (const auto& it : ignored_headers) {
       if (it.second.find(arch) == it.second.end()) {
         continue;
       }
diff --git a/tools/versioner/src/versioner.h b/tools/versioner/src/versioner.h
index 5e53498..e9c4989 100644
--- a/tools/versioner/src/versioner.h
+++ b/tools/versioner/src/versioner.h
@@ -33,15 +33,11 @@
     }                      \
   } while (0)
 
-static const std::unordered_map<std::string, std::set<Arch>> header_blacklist = {
+static const std::unordered_map<std::string, std::set<Arch>> ignored_headers = {
   // Internal header.
+  // TODO: we should probably just admit we're never getting rid of this.
   { "sys/_system_properties.h", supported_archs },
 
   // time64.h #errors when included on LP64 archs.
   { "time64.h", { Arch::arm64, Arch::x86_64 } },
 };
-
-static const std::unordered_set<std::string> missing_symbol_whitelist = {
-  // atexit comes from crtbegin.
-  "atexit",
-};