diff --git a/td/telegram/MessageContent.cpp b/td/telegram/MessageContent.cpp
index 3b5cdde77..09165bb71 100644
--- a/td/telegram/MessageContent.cpp
+++ b/td/telegram/MessageContent.cpp
@@ -1870,7 +1870,7 @@ static void parse(unique_ptr<MessageContent> &content, ParserT &parser) {
       break;
     }
     default:
-      LOG(FATAL) << "Have unknown message content type " << static_cast<int32>(content_type);
+      is_bad = true;
   }
   if (is_bad) {
     LOG(ERROR) << "Load a message with an invalid content of type " << content_type;
diff --git a/td/telegram/MessageContentType.cpp b/td/telegram/MessageContentType.cpp
index 091835cb0..28e1903fc 100644
--- a/td/telegram/MessageContentType.cpp
+++ b/td/telegram/MessageContentType.cpp
@@ -127,8 +127,7 @@ StringBuilder &operator<<(StringBuilder &string_builder, MessageContentType cont
     case MessageContentType::Story:
       return string_builder << "Story";
     default:
-      UNREACHABLE();
-      return string_builder;
+      return string_builder << "Invalid type " << static_cast<int32>(content_type);
   }
 }
 
diff --git a/td/telegram/StoryContent.cpp b/td/telegram/StoryContent.cpp
index 3550605c3..6f1e6145c 100644
--- a/td/telegram/StoryContent.cpp
+++ b/td/telegram/StoryContent.cpp
@@ -150,7 +150,6 @@ static void parse(unique_ptr<StoryContent> &content, ParserT &parser) {
       break;
     }
     default:
-      LOG(ERROR) << "Have unknown story content type " << static_cast<int32>(content_type);
       is_bad = true;
   }
   if (is_bad) {
diff --git a/td/telegram/StoryContentType.cpp b/td/telegram/StoryContentType.cpp
index 40bfa7737..f467c2663 100644
--- a/td/telegram/StoryContentType.cpp
+++ b/td/telegram/StoryContentType.cpp
@@ -17,8 +17,7 @@ StringBuilder &operator<<(StringBuilder &string_builder, StoryContentType conten
     case StoryContentType::Unsupported:
       return string_builder << "Unsupported";
     default:
-      UNREACHABLE();
-      return string_builder;
+      return string_builder << "Invalid type " << static_cast<int32>(content_type);
   }
 }