diff --git a/src/google/protobuf/generated_message_tctable_lite.cc b/src/google/protobuf/generated_message_tctable_lite.cc
index 765459d507..64aa01580c 100644
--- a/src/google/protobuf/generated_message_tctable_lite.cc
+++ b/src/google/protobuf/generated_message_tctable_lite.cc
@@ -2087,6 +2087,7 @@ PROTOBUF_NOINLINE const char* TcParser::MpRepeatedVarint(
 
     default:
       PROTOBUF_ASSUME(false);
+      return nullptr;  // To silence -Werror=return-type in some toolchains
   }
 }
 
@@ -2182,6 +2183,7 @@ PROTOBUF_NOINLINE const char* TcParser::MpPackedVarint(PROTOBUF_TC_PARAM_DECL) {
 
     default:
       PROTOBUF_ASSUME(false);
+      return nullptr;  // To silence -Werror=return-type in some toolchains
   }
 }