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-rw-r--r--Zend/zend_constants.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/Zend/zend_constants.c b/Zend/zend_constants.c
index 670a76199d..bc678e2e71 100644
--- a/Zend/zend_constants.c
+++ b/Zend/zend_constants.c
@@ -312,8 +312,8 @@ ZEND_API int zend_register_constant(zend_constant *c TSRMLS_DC)
if (!(c->flags & CONST_CS)) {
/* keep in mind that c->name_len already contains the '\0' */
- lowercase_name = estrndup(c->name, c->name_len);
- zend_str_tolower(lowercase_name, c->name_len);
+ lowercase_name = estrndup(c->name, c->name_len-1);
+ zend_str_tolower(lowercase_name, c->name_len-1);
name = lowercase_name;
} else {
name = c->name;