diff --git a/libraries/libfc/include/fc/crypto/bls_signature.hpp b/libraries/libfc/include/fc/crypto/bls_signature.hpp
index 38111086a2..ef2b80b725 100644
--- a/libraries/libfc/include/fc/crypto/bls_signature.hpp
+++ b/libraries/libfc/include/fc/crypto/bls_signature.hpp
@@ -11,7 +11,7 @@
 namespace fc::crypto::blslib {
 
    namespace config {
-      constexpr std::string bls_signature_prefix = "SIG_BLS_";
+      const std::string bls_signature_prefix = "SIG_BLS_";
    };
    
    class bls_signature