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-rw-r--r--Zend/zend_constants.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/Zend/zend_constants.h b/Zend/zend_constants.h
index 516241bfad..319a3b9bf2 100644
--- a/Zend/zend_constants.h
+++ b/Zend/zend_constants.h
@@ -26,6 +26,7 @@
#define CONST_CS (1<<0) /* Case Sensitive */
#define CONST_PERSISTENT (1<<1) /* Persistent */
+#define CONST_CT_SUBST (2<<1) /* Allow compile-time substitution */
#define PHP_USER_CONSTANT INT_MAX /* a constant defined in user space */