diff --git a/src/policy/policy.h b/src/policy/policy.h
index 1551aecde8..0ea0d435ad 100644
--- a/src/policy/policy.h
+++ b/src/policy/policy.h
@@ -37,7 +37,8 @@ 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_CHECKLOCKTIMEVERIFY |
+                                                         SCRIPT_VERIFY_LOW_S;
 
 /** For convenience, standard but not mandatory verify flags. */
 static const unsigned int STANDARD_NOT_MANDATORY_VERIFY_FLAGS = STANDARD_SCRIPT_VERIFY_FLAGS & ~MANDATORY_SCRIPT_VERIFY_FLAGS;