diff --git a/ext/dba/dba.c b/ext/dba/dba.c
index f3b1cc4ae9f..f07af596b46 100644
--- a/ext/dba/dba.c
+++ b/ext/dba/dba.c
@@ -37,6 +37,7 @@
 #include "php_dba.h"
 #include "ext/standard/info.h"
 #include "ext/standard/php_string.h"
+#include "ext/standard/flock_compat.h"
 
 #include "php_gdbm.h"
 #include "php_ndbm.h"