diff --git a/debugger/break.c b/debugger/break.c
index 4778bb7..705528c 100644
--- a/debugger/break.c
+++ b/debugger/break.c
@@ -1,5 +1,6 @@
 
 #include <stdio.h>
+#include <stdlib.h>
 
 #define N_BP 25