diff --git a/src/jrd/os/posix/unix.cpp b/src/jrd/os/posix/unix.cpp
index 6f722abad9..43b489d242 100644
--- a/src/jrd/os/posix/unix.cpp
+++ b/src/jrd/os/posix/unix.cpp
@@ -106,11 +106,7 @@ using namespace Firebird;
 #define O_BINARY	0
 #endif
 
-#ifdef SUPERSERVER
-#define MASK		0600
-#else
-#define MASK		0660
-#endif
+static const mode_t MASK = 0660;
 
 #define FCNTL_BROKEN
 // please undefine FCNTL_BROKEN for operating systems,