diff --git a/jitterbuf.c b/jitterbuf.c
index 6f1c1bb71848f3530b64f3e58a9054d3f89e9514..2fb349764e02c76289b634dfa541a16acc8fa842 100644
--- a/jitterbuf.c
+++ b/jitterbuf.c
@@ -158,7 +158,7 @@ static int history_put(jitterbuf *jb, long ts, long now, long ms)
 		}
 	}
 
-	kicked = jb->history[jb->hist_ptr & JB_HISTORY_SZ];
+	kicked = jb->history[jb->hist_ptr % JB_HISTORY_SZ];
 
 	jb->history[(jb->hist_ptr++) % JB_HISTORY_SZ] = delay;