diff --git a/client/proxmark3.c b/client/proxmark3.c
index 4b898d54..96f900c7 100644
--- a/client/proxmark3.c
+++ b/client/proxmark3.c
@@ -91,7 +91,7 @@ static void *main_loop(void *targ)
                     nl = strrchr(script_cmd_buf, '\n');
                     if (nl) *nl = '\0';
 	            
-                    if ((cmd = (char*) malloc(strlen(script_cmd_buf))) != NULL)
+                    if ((cmd = (char*) malloc(strlen(script_cmd_buf) + 1)) != NULL)
                     {
                         memset(cmd, 0, strlen(script_cmd_buf));
                         strcpy(cmd, script_cmd_buf);