diff --git a/src/script.c b/src/script.c
index 6b99ec2..41a415b 100644
--- a/src/script.c
+++ b/src/script.c
@@ -265,6 +265,9 @@ static int expect(lua_State *L)
     int ret = 0;
     char c;
 
+    // Resets buffer to ignore previous `expect` calls
+    buffer_size = 0;
+
     if ((string == NULL) || (timeout < 0))
     {
         ret = -1;