diff --git a/Makefile b/Makefile
index 89e8356..3775e00 100755
--- a/Makefile
+++ b/Makefile
@@ -3,7 +3,7 @@
 
 OUTNAME = flisp
 
-CFLAGS = -std=c99 -O0 -Wall -Wextra -g -pipe -Wno-cast-function-type 
+CFLAGS = -std=c99 -O0 -flto -Wall -Wextra -g -pipe -Wno-cast-function-type 
 
 CC = gcc
 
diff --git a/src/exec_common.c b/src/exec_common.c
index ef84445..c301fac 100644
--- a/src/exec_common.c
+++ b/src/exec_common.c
@@ -183,7 +183,7 @@ void *get_addr(u32 pos){
   return internal_buf + pos;
 }
 
-Value write(Value a);
+Value fl_write(Value a);
 
 void print_ast1(Statement *base, i32 indent){
   i32 close_parent = 1;
@@ -198,7 +198,7 @@ void print_ast1(Statement *base, i32 indent){
       printf("(call<%lx>\n", (u64)base->func);
       break;
     case ST_Const:
-      write(base->cons);
+      fl_write(base->cons);
       printf("\n");
       close_parent = 0;
       break;
@@ -598,7 +598,7 @@ Value pop(Value a, Value b){
 
 }
 
-Value write(Value a){
+Value fl_write(Value a){
   char *nstr;
   switch(a.tag.type){
     case T_null:
@@ -668,7 +668,7 @@ FnSig builtins[] = {
   {{tvec}     ,1,1,{.bi = BICAST(len)}},
   {{tvec,tany},2,1,{.bi = BICAST(push)}},
   {{tvec,tint},2,1,{.bi = BICAST(pop)}},
-  {{tany}     ,1,1,{.bi = BICAST(write)}},
+  {{tany}     ,1,1,{.bi = BICAST(fl_write)}},
   {{0}        ,0,1,{.bi = BICAST(nwline)}}
 };
 
diff --git a/src/main.c b/src/main.c
index 58e0dec..e038859 100644
--- a/src/main.c
+++ b/src/main.c
@@ -20,6 +20,7 @@
 #include <stdio.h>
 #include <string.h>
 #include <stdlib.h>
+#include <unistd.h>
 
 #include "types.h"
 #include "tests.h"
@@ -34,7 +35,7 @@ extern FILE *yyin;
 
 int main(int argc, char *argv[]){
   i32 fpos = 1;
- 
+
   if(argc > 1){ 
     if(!strcmp(argv[1], "--tests")){
       fpos++;