diff --git a/src/console.asm b/src/console.asm
index 3689d9c..28902b3 100644
--- a/src/console.asm
+++ b/src/console.asm
@@ -246,6 +246,8 @@ printf:
 		je	.rep_x
 		cmp	byte [rdi + 1], 'b'
 		je	.rep_b
+		cmp	byte [rdi + 1], 'o'
+		je	.rep_o
 		cmp	byte [rdi + 1], 's'
 		je	.rep_s
 
@@ -323,6 +325,20 @@ printf:
 			pop_regs
 		jmp	.insertString
 
+		;--- '%o' ---;
+		.rep_o:
+			load_arg rsi
+			push_regs
+		mov	rdi, rsi
+		mov	rsi, 8
+		mov	rdx, r12
+		mov	rcx, r13
+		mov	r8, 0
+		call	utoa
+		mov	rsi, rax
+			pop_regs
+		jmp	.insertString
+
 		;--- '%s' ---;
 		.rep_s:
 			load_arg rsi
diff --git a/src/convert.asm b/src/convert.asm
index f01e5ba..bda7dc7 100644
--- a/src/convert.asm
+++ b/src/convert.asm
@@ -123,7 +123,7 @@ itoa:
 ;----- utoa(int, base, padLen, bool padZeroes, bool upperCase) -----;
 ; Converts an unsigned integer to a string
 ; Return value: Pointer to converted string or 0(EOS) if entered base is invalid
-; Supported bases: 2 (binary), 10 (decimal), 16 (hexadecimal)
+; Supported bases: 2 (binary), 8, (octal), 10 (decimal), 16 (hexadecimal)
 ; Used registers:
 ;	rax*	num to divide (DIV) >> Copy bytes when reversing string >> (ret) Pointer to converted string
 ;	rbx	Stores (upperCase)
@@ -143,6 +143,8 @@ utoa:
 	; Before doing anything, check if base is valid
 	cmp	rsi, 2
 	je	.ok
+	cmp	rsi, 8
+	je	.ok
 	cmp	rsi, 10
 	je	.ok
 	cmp	rsi, 16
@@ -161,7 +163,7 @@ utoa:
 	mov	r13, rsi
 	mov	r14, rdx
 	mov	r15, rcx
-	; First, assure 0 <= padLen <= 64 ;(64, even though max signed int64 = 19 characters; enables to pad with base 2)
+	; First, assure 0 <= padLen <= 64
 	mov	rdi, rdx
 	xor	rsi, rsi
 	mov	rdx, 64
diff --git a/src/tests.asm b/src/tests.asm
index ce3ee0f..c247581 100644
--- a/src/tests.asm
+++ b/src/tests.asm
@@ -99,6 +99,8 @@ section .rodata
 	printf11Str		db	"%X | %8X | %08X",NL,EOS
 	printf12		db	TAB,"rax=0x1234567890ABCDEF",NL,TAB,"printf(",DQUO,"\nRAX\t%064b\nEAX\t\t\t\t\t%032b\n AX\t\t\t\t\t\t\t%016b\n AH\t\t\t\t\t\t\t%08b\t\n AL\t\t\t\t\t\t\t\t%08b\n",DQUO,", rax, eax, ax, ah, al): ",NL,TAB,TAB,EOS
 	printf12Str		db	"\nRAX\t%064b\nEAX\t\t\t\t\t%032b\n AX\t\t\t\t\t\t\t%016b\n AH\t\t\t\t\t\t\t%08b\t\n AL\t\t\t\t\t\t\t\t%08b\n",EOS
+	printf13		db	TAB,"printf(",DQUO,"%o | %8o | %08o\n",DQUO,", 1500, 1500, 1500): ",NL,TAB,TAB,EOS
+	printf13Str		db	"%o | %8o | %08o\n",EOS
 
 	; strlen()
 	msgStrlen		db	NL,"TEST strlen()",NL,EOS
@@ -374,6 +376,15 @@ _start:
 	shr	r8, 8
 	mov	r9b, al
 	call	printf
+
+	; TEST 13
+	lea	rdi, [rel printf13]
+	call	print
+	lea	rdi, [rel printf13Str]
+	mov	rsi, 1500
+	mov	rdx, 1500
+	mov	rcx, 1500
+	call	printf
 %endif
 
 ;---