diff --git a/sbe-tool/src/main/java/uk/co/real_logic/sbe/generation/cpp/CppGenerator.java b/sbe-tool/src/main/java/uk/co/real_logic/sbe/generation/cpp/CppGenerator.java
index c82a0f0a14..54a1683371 100755
--- a/sbe-tool/src/main/java/uk/co/real_logic/sbe/generation/cpp/CppGenerator.java
+++ b/sbe-tool/src/main/java/uk/co/real_logic/sbe/generation/cpp/CppGenerator.java
@@ -2673,10 +2673,10 @@ private CharSequence generateMessageFlyweightCode(
             "%22$s" +
 
             "public:\n" +
-            "    static const %1$s SBE_BLOCK_LENGTH = %2$s;\n" +
-            "    static const %3$s SBE_TEMPLATE_ID = %4$s;\n" +
-            "    static const %5$s SBE_SCHEMA_ID = %6$s;\n" +
-            "    static const %7$s SBE_SCHEMA_VERSION = %8$s;\n" +
+            "    static constexpr %1$s SBE_BLOCK_LENGTH = %2$s;\n" +
+            "    static constexpr %3$s SBE_TEMPLATE_ID = %4$s;\n" +
+            "    static constexpr %5$s SBE_SCHEMA_ID = %6$s;\n" +
+            "    static constexpr %7$s SBE_SCHEMA_VERSION = %8$s;\n" +
             "    static constexpr const char* SBE_SEMANTIC_VERSION = \"%13$s\";\n\n" +
 
             "    enum MetaAttribute\n" +