diff --git a/libavcodec/lpc.c b/libavcodec/lpc.c
index a2a21dfc91..4d2ae799e2 100644
--- a/libavcodec/lpc.c
+++ b/libavcodec/lpc.c
@@ -192,6 +192,9 @@ int ff_lpc_calc_coefs(LPCContext *s,
         LLSModel m[2];
         double var[MAX_LPC_ORDER+1], av_uninit(weight);
 
+        if(lpc_passes <= 0)
+            lpc_passes = 2;
+
         for(pass=0; pass<lpc_passes; pass++){
             av_init_lls(&m[pass&1], max_order);