diff --git a/CMakeLists.txt b/CMakeLists.txt
index 69169c4..780ed21 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -132,7 +132,7 @@
 if(CMAKE_COMPILER_IS_GNUCXX OR CLANG)
   # Note clang-cl is odd and sets both CLANG and MSVC. We base our configuration
   # primarily on our normal Clang one.
-  set(C_CXX_FLAGS "-Werror -Wformat=2 -Wsign-compare -Wmissing-field-initializers -Wwrite-strings -Wvla -Wshadow")
+  set(C_CXX_FLAGS "-Werror -Wformat=2 -Wsign-compare -Wmissing-field-initializers -Wwrite-strings -Wvla -Wshadow -Wtype-limits")
   if(MSVC)
     # clang-cl sets different default warnings than clang. It also treats -Wall
     # as -Weverything, to match MSVC. Instead -W3 is the alias for -Wall.
diff --git a/crypto/trust_token/trust_token.c b/crypto/trust_token/trust_token.c
index ccfecdb..55785d5 100644
--- a/crypto/trust_token/trust_token.c
+++ b/crypto/trust_token/trust_token.c
@@ -626,11 +626,7 @@
     return CBB_add_u8(cbb, 0x1a | major_type) &&
            CBB_add_u32(cbb, (uint32_t)value);
   }
-  if (value <= 0xffffffffffffffff) {
-    return CBB_add_u8(cbb, 0x1b | major_type) && CBB_add_u64(cbb, value);
-  }
-
-  return 0;
+  return CBB_add_u8(cbb, 0x1b | major_type) && CBB_add_u64(cbb, value);
 }
 
 // https://tools.ietf.org/html/rfc7049#section-2.1