diff --git a/libavcodec/ac3enc.h b/libavcodec/ac3enc.h
index 563dcd532e..2d04f26303 100644
--- a/libavcodec/ac3enc.h
+++ b/libavcodec/ac3enc.h
@@ -243,8 +243,6 @@ typedef struct AC3EncodeContext {
 } AC3EncodeContext;
 
 
-extern const int64_t ff_ac3_channel_layouts[19];
-
 int ff_ac3_encode_init(AVCodecContext *avctx);
 
 int ff_ac3_encode_frame(AVCodecContext *avctx, unsigned char *frame,