diff --git a/libavcodec/libopencore-amr.c b/libavcodec/libopencore-amr.c
index a81d272a1c..b1eb65c885 100644
--- a/libavcodec/libopencore-amr.c
+++ b/libavcodec/libopencore-amr.c
@@ -53,7 +53,7 @@ typedef struct AMR_bitrates {
 static int getBitrateMode(int bitrate)
 {
     /* make the correspondance between bitrate and mode */
-    AMR_bitrates rates[] = { { 4750, MR475},
+    static const AMR_bitrates rates[] = {{ 4750, MR475},
                              { 5150, MR515},
                              { 5900, MR59},
                              { 6700, MR67},
diff --git a/libavcodec/libvo-amrwbenc.c b/libavcodec/libvo-amrwbenc.c
index a5e8f397c9..8ef4f81638 100644
--- a/libavcodec/libvo-amrwbenc.c
+++ b/libavcodec/libvo-amrwbenc.c
@@ -41,7 +41,7 @@ typedef struct AMRWBContext {
 static int getWBBitrateMode(int bitrate)
 {
     /* make the correspondance between bitrate and mode */
-    AMRWB_bitrates rates[] = { { 6600, 0},
+    static const AMRWB_bitrates rates[] = { { 6600, 0},
                                { 8850, 1},
                                {12650, 2},
                                {14250, 3},