diff --git a/Makefile b/Makefile
index 38b83be..c29620a 100644
--- a/Makefile
+++ b/Makefile
@@ -1,5 +1,5 @@
 NASM=nasm
-NASMFLAGS=-f elf64 -g -F dwarf
+NASMFLAGS=-f elf64 -g -F dwarf -D PIC
 AR=ar
 ARFLAGS=rcs
 CC=gcc
@@ -12,7 +12,8 @@ SHARED_LIB=lib$(LIB_NAME).so
 
 SRCS=$(SRC_DIR)/ft_strlen.asm \
      $(SRC_DIR)/ft_strcpy.asm \
-		 $(SRC_DIR)/ft_strcmp.asm
+		 $(SRC_DIR)/ft_strcmp.asm \
+		 $(SRC_DIR)/ft_write.asm
 
 OBJS=$(patsubst $(SRC_DIR)/%.asm,$(OBJ_DIR)/%.o,$(SRCS))
 DEPS=$(OBJS:.o=.d)
diff --git a/src/ft_write.asm b/src/ft_write.asm
new file mode 100644
index 0000000..539fdb0
--- /dev/null
+++ b/src/ft_write.asm
@@ -0,0 +1,21 @@
+global ft_write
+extern __errno_location
+section .text
+
+ft_write:
+	mov		eax, 1
+	syscall
+
+	; if rax >= 0
+	test		rax, rax
+	jns		.done
+
+	neg		rax
+	mov		edi, eax
+	call	__errno_location wrt ..plt
+	mov		dword [rax], edi
+	mov		eax, -1
+
+.done:
+	ret
+
diff --git a/src/mylib.h b/src/mylib.h
index b12f01a..9663002 100644
--- a/src/mylib.h
+++ b/src/mylib.h
@@ -1,7 +1,7 @@
 #ifndef MYLIB_H
 #define MYLIB_H
 
-#include <string.h>
+#include <sys/types.h>
 #ifdef __cplusplus
 extern "C" {
 #endif
@@ -9,6 +9,7 @@ extern "C" {
 size_t	ft_strlen(char *str);
 char		*ft_strcpy(char *dest, const char *src);
 int			ft_strcmp (const char *p1, const char *p2);
+ssize_t	ft_write(int fildes, const void *buf, size_t nbyte);
 
 #ifdef __cplusplus
 }