diff --git a/absl/flags/marshalling.cc b/absl/flags/marshalling.cc
index dc69754..ca4a130 100644
--- a/absl/flags/marshalling.cc
+++ b/absl/flags/marshalling.cc
@@ -247,6 +247,14 @@
     *err = "no value provided";
     return false;
   }
+  if (absl::EqualsIgnoreCase(text, "dfatal")) {
+    *dst = absl::kLogDebugFatal;
+    return true;
+  }
+  if (absl::EqualsIgnoreCase(text, "klogdebugfatal")) {
+    *dst = absl::kLogDebugFatal;
+    return true;
+  }
   if (text.front() == 'k' || text.front() == 'K') text.remove_prefix(1);
   if (absl::EqualsIgnoreCase(text, "info")) {
     *dst = absl::LogSeverity::kInfo;
@@ -269,7 +277,8 @@
     *dst = static_cast<absl::LogSeverity>(numeric_value);
     return true;
   }
-  *err = "only integers and absl::LogSeverity enumerators are accepted";
+  *err =
+      "only integers, absl::LogSeverity enumerators, and DFATAL are accepted";
   return false;
 }