diff --git a/libavcodec/aaccoder.c b/libavcodec/aaccoder.c
index 31d3b23d2456b60851363441a2e8252a74e83578..d6750a24544ea7c97fc7c5c9953317e201408bd8 100644
--- a/libavcodec/aaccoder.c
+++ b/libavcodec/aaccoder.c
@@ -1112,7 +1112,7 @@ static void search_for_ms(AACEncContext *s, ChannelElement *cpe,
     }
 }
 
-AACCoefficientsEncoder ff_aac_coders[] = {
+AACCoefficientsEncoder ff_aac_coders[AAC_CODER_NB] = {
     {
         search_for_quantizers_faac,
         encode_window_bands_info,
diff --git a/libavcodec/aacenc.h b/libavcodec/aacenc.h
index 150c6516650e4faf238df0bdd81c274738fa8af0..8dcf27d6a968e81ca40280fbebd1ce28d8b1f1b0 100644
--- a/libavcodec/aacenc.h
+++ b/libavcodec/aacenc.h
@@ -30,6 +30,8 @@
 
 #include "psymodel.h"
 
+#define AAC_CODER_NB 4
+
 typedef struct AACEncOptions {
     int stereo_mode;
 } AACEncOptions;