diff --git a/libavcodec/sipr16k.c b/libavcodec/sipr16k.c
index bfd8ade37d..9c8f684003 100644
--- a/libavcodec/sipr16k.c
+++ b/libavcodec/sipr16k.c
@@ -50,7 +50,7 @@ static void lsf2lsp(const float *lsf, double *lsp)
         lsp[i] = cosf(lsf[i]);
 }
 
-static void dequant(float *out, const int *idx, const float *cbs[])
+static void dequant(float *out, const int *idx, const float * const cbs[])
 {
     int i;
 
diff --git a/libavcodec/sipr16kdata.h b/libavcodec/sipr16kdata.h
index 96bf0e96c8..16a653da94 100644
--- a/libavcodec/sipr16kdata.h
+++ b/libavcodec/sipr16kdata.h
@@ -525,7 +525,7 @@ static const float lsf_cb5_16k[128][4] = {
     { 0.124405,  0.009943, -0.148477, -0.205184}
 };
 
-static const float *lsf_codebooks_16k[] = {
+static const float * const lsf_codebooks_16k[] = {
     lsf_cb1_16k[0], lsf_cb2_16k[0], lsf_cb3_16k[0], lsf_cb4_16k[0],
     lsf_cb5_16k[0]
 };