diff --git a/src/script/standard.h b/src/script/standard.h
index e4203f377..6d72bad23 100644
--- a/src/script/standard.h
+++ b/src/script/standard.h
@@ -51,6 +51,7 @@ static const unsigned int STANDARD_SCRIPT_VERIFY_FLAGS = MANDATORY_SCRIPT_VERIFY
                                                          SCRIPT_VERIFY_NULLDUMMY |
                                                          SCRIPT_VERIFY_DISCOURAGE_UPGRADABLE_NOPS |
                                                          SCRIPT_VERIFY_CLEANSTACK |
+                                                         SCRIPT_VERIFY_CHECKLOCKTIMEVERIFY |
                                                          SCRIPT_VERIFY_LOW_S;
 
 /** For convenience, standard but not mandatory verify flags. */