diff --git a/libavcodec/lsp.c b/libavcodec/lsp.c
index 26b35843b6..1b4afa22e8 100644
--- a/libavcodec/lsp.c
+++ b/libavcodec/lsp.c
@@ -120,8 +120,8 @@ void ff_acelp_lsp2lpc(int16_t* lp, const int16_t* lsp, int lp_half_order)
 void ff_amrwb_lsp2lpc(const double *lsp, float *lp, int lp_order)
 {
     int lp_half_order = lp_order >> 1;
-    double buf[lp_half_order + 1];
-    double pa[lp_half_order + 1];
+    double buf[MAX_LP_HALF_ORDER + 1];
+    double pa[MAX_LP_HALF_ORDER + 1];
     double *qa = buf + 1;
     int i,j;
 
diff --git a/libavcodec/lsp.h b/libavcodec/lsp.h
index 3648ec74e5..4b955678ee 100644
--- a/libavcodec/lsp.h
+++ b/libavcodec/lsp.h
@@ -91,7 +91,7 @@ void ff_amrwb_lsp2lpc(const double *lsp, float *lp, int lp_order);
 void ff_acelp_lp_decode(int16_t* lp_1st, int16_t* lp_2nd, const int16_t* lsp_2nd, const int16_t* lsp_prev, int lp_order);
 
 
-#define MAX_LP_HALF_ORDER 8
+#define MAX_LP_HALF_ORDER 10
 #define MAX_LP_ORDER      (2*MAX_LP_HALF_ORDER)
 
 /**