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-rw-r--r--Zend/zend_alloc.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/Zend/zend_alloc.c b/Zend/zend_alloc.c
index ede2c94bcc..1166008099 100644
--- a/Zend/zend_alloc.c
+++ b/Zend/zend_alloc.c
@@ -438,7 +438,7 @@ static long _mem_block_end_magic = MEM_BLOCK_END_MAGIC;
#else
-# define ZEND_MM_VALID_PTR(ptr) 1
+# define ZEND_MM_VALID_PTR(ptr) (ptr != NULL)
# define ZEND_MM_SET_MAGIC(block, val)