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-rw-r--r--ext/mysqlnd/mysqlnd.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/ext/mysqlnd/mysqlnd.h b/ext/mysqlnd/mysqlnd.h
index b914afed6a..dc153f208e 100644
--- a/ext/mysqlnd/mysqlnd.h
+++ b/ext/mysqlnd/mysqlnd.h
@@ -36,7 +36,7 @@
on production systems, if of course measured performance degradation is not
minimal.
*/
-#if A0 && PHP_DEBUG
+#if defined(A0) && PHP_DEBUG
#define MYSQLND_DO_WIRE_CHECK_BEFORE_COMMAND 1
#endif