diff --git a/src/constants/file.asm b/src/constants/file.asm
index cd61a32..0be0dce 100644
--- a/src/constants/file.asm
+++ b/src/constants/file.asm
@@ -40,6 +40,8 @@ section .rodata
 	S_ISVTX			equ	0001000q ;sticky bit
 	S_ISGID			equ	0002000q ;set-group-ID bit
 	S_ISUID			equ	0004000q ;set-user-ID bit
+	DEF_MODE_FILE		equ	S_IWOTH | S_IROTH | S_IWGRP | S_IRGRP | S_IWUSR | S_IRUSR
+	DEF_MODE_DIR		equ	S_IRWXO | S_IRWXG | S_IRWXU
 	; Stat buffer fields
         ST_DEV          	equ     0       ; Device				unsigned
         ST_INO          	equ     8       ; File serial number			unsigned
diff --git a/src/file.asm b/src/file.asm
index f92a8f5..34a3cee 100644
--- a/src/file.asm
+++ b/src/file.asm
@@ -113,7 +113,7 @@ fopen:
 	pop	rdi
 	push	rdi
 	not	rax
-	mov	rsi, 0666q
+	mov	rsi, DEF_MODE_FILE
 	and	rsi, rax
 	mov	rax, NR_creat
 	syscall