diff --git a/tty.c b/tty.c
index 6166e12..d1ec478 100644
--- a/tty.c
+++ b/tty.c
@@ -8,6 +8,7 @@
  * wish to use. Please note that they contain bugs  *
  ****************************************************/
 
+#define tty_lib true
 
 /* In order to restore at exit.*/
 static struct termios orig_termios;
diff --git a/vm.c b/vm.c
index ae6a2ac..787db72 100644
--- a/vm.c
+++ b/vm.c
@@ -1,5 +1,4 @@
 #include "vm.h"
-//#define DEBUG true
 uint32_t performance_counter;
 
 /* Prototypes for functions in vm_instructions.c*/
diff --git a/vm_instructions.c b/vm_instructions.c
index 8d5ec91..cd7531b 100644
--- a/vm_instructions.c
+++ b/vm_instructions.c
@@ -2,6 +2,10 @@
 FILE* tape_01;
 FILE* tape_02;
 
+#ifdef tty_lib
+char tty_getchar();
+#endif
+
 /* Correctly write out bytes on little endian hardware */
 void writeout_Reg(struct lilith* vm, uint32_t p, uint32_t value)
 {
@@ -199,7 +203,12 @@ void vm_FGETC(struct lilith* vm)
 
 	if (0x00000000 == vm->reg[1])
 	{
+		#ifdef tty_lib
+		byte = tty_getchar();
+		#endif
+		#ifndef tty_lib
 		byte = fgetc(stdin);
+		#endif
 	}
 
 	if(0x00001100 == vm->reg[1])