diff --git a/libavcodec/ac3.h b/libavcodec/ac3.h
index 7c2e3d9cbb..0d1a850c9e 100644
--- a/libavcodec/ac3.h
+++ b/libavcodec/ac3.h
@@ -84,7 +84,7 @@ typedef struct {
     uint8_t bitstream_id;
     uint8_t channel_mode;
     uint8_t lfe_on;
-    uint8_t stream_type;
+    uint8_t frame_type;
     /** @} */
 
     /** @defgroup derived Derived values
@@ -99,11 +99,11 @@ typedef struct {
 } AC3HeaderInfo;
 
 typedef enum {
-    EAC3_STREAM_TYPE_INDEPENDENT = 0,
-    EAC3_STREAM_TYPE_DEPENDENT,
-    EAC3_STREAM_TYPE_AC3_CONVERT,
-    EAC3_STREAM_TYPE_RESERVED
-} EAC3StreamType;
+    EAC3_FRAME_TYPE_INDEPENDENT = 0,
+    EAC3_FRAME_TYPE_DEPENDENT,
+    EAC3_FRAME_TYPE_AC3_CONVERT,
+    EAC3_FRAME_TYPE_RESERVED
+} EAC3FrameType;
 
 void ac3_common_init(void);
 
diff --git a/libavcodec/ac3_parser.c b/libavcodec/ac3_parser.c
index ea7f592082..d0a22b9950 100644
--- a/libavcodec/ac3_parser.c
+++ b/libavcodec/ac3_parser.c
@@ -84,13 +84,13 @@ int ff_ac3_parse_header(const uint8_t buf[7], AC3HeaderInfo *hdr)
         hdr->bit_rate = (ff_ac3_bitrate_tab[frame_size_code>>1] * 1000) >> hdr->sr_shift;
         hdr->channels = ff_ac3_channels_tab[hdr->channel_mode] + hdr->lfe_on;
         hdr->frame_size = ff_ac3_frame_size_tab[frame_size_code][hdr->sr_code] * 2;
-        hdr->stream_type = EAC3_STREAM_TYPE_INDEPENDENT;
+        hdr->frame_type = EAC3_FRAME_TYPE_INDEPENDENT;
     } else {
         /* Enhanced AC-3 */
         hdr->crc1 = 0;
-        hdr->stream_type = get_bits(&gbc, 2);
-        if(hdr->stream_type == EAC3_STREAM_TYPE_RESERVED)
-            return AC3_PARSE_ERROR_STREAM_TYPE;
+        hdr->frame_type = get_bits(&gbc, 2);
+        if(hdr->frame_type == EAC3_FRAME_TYPE_RESERVED)
+            return AC3_PARSE_ERROR_FRAME_TYPE;
 
         skip_bits(&gbc, 3); // skip substream id
 
@@ -138,14 +138,14 @@ static int ac3_sync(AACAC3ParseContext *hdr_info, AACAC3FrameFlag *flag)
     hdr_info->channels = hdr.channels;
     hdr_info->samples = AC3_FRAME_SIZE;
 
-    switch(hdr.stream_type){
-        case EAC3_STREAM_TYPE_INDEPENDENT:
+    switch(hdr.frame_type){
+        case EAC3_FRAME_TYPE_INDEPENDENT:
             *flag = FRAME_START;
             break;
-        case EAC3_STREAM_TYPE_DEPENDENT:
+        case EAC3_FRAME_TYPE_DEPENDENT:
             *flag = FRAME_CONTINUATION;
             break;
-        case EAC3_STREAM_TYPE_AC3_CONVERT:
+        case EAC3_FRAME_TYPE_AC3_CONVERT:
             *flag = FRAME_COMPLETE;
             break;
     }
diff --git a/libavcodec/ac3_parser.h b/libavcodec/ac3_parser.h
index f82be029fb..1e512bf2b6 100644
--- a/libavcodec/ac3_parser.h
+++ b/libavcodec/ac3_parser.h
@@ -30,7 +30,7 @@ typedef enum {
     AC3_PARSE_ERROR_BSID        = -2,
     AC3_PARSE_ERROR_SAMPLE_RATE = -3,
     AC3_PARSE_ERROR_FRAME_SIZE  = -4,
-    AC3_PARSE_ERROR_STREAM_TYPE = -5,
+    AC3_PARSE_ERROR_FRAME_TYPE  = -5,
 } AC3ParseError;
 
 /**
diff --git a/libavcodec/ac3dec.c b/libavcodec/ac3dec.c
index a1bbef256c..fc12f347fb 100644
--- a/libavcodec/ac3dec.c
+++ b/libavcodec/ac3dec.c
@@ -1169,8 +1169,8 @@ static int ac3_decode_frame(AVCodecContext * avctx, void *data, int *data_size,
             case AC3_PARSE_ERROR_FRAME_SIZE:
                 av_log(avctx, AV_LOG_ERROR, "invalid frame size\n");
                 break;
-            case AC3_PARSE_ERROR_STREAM_TYPE:
-                av_log(avctx, AV_LOG_ERROR, "invalid stream type\n");
+            case AC3_PARSE_ERROR_FRAME_TYPE:
+                av_log(avctx, AV_LOG_ERROR, "invalid frame type\n");
                 break;
             default:
                 av_log(avctx, AV_LOG_ERROR, "invalid header\n");