diff --git a/libavfilter/formats.c b/libavfilter/formats.c
index 20a2c89719..31ee445c49 100644
--- a/libavfilter/formats.c
+++ b/libavfilter/formats.c
@@ -662,20 +662,12 @@ int ff_parse_sample_rate(int *ret, const char *arg, void *log_ctx)
 int ff_parse_channel_layout(int64_t *ret, int *nret, const char *arg,
                             void *log_ctx)
 {
-    char *tail;
     int64_t chlayout;
     int nb_channels;
 
     if (av_get_extended_channel_layout(arg, &chlayout, &nb_channels) < 0) {
-        /* [TEMPORARY 2016-12 -> 2017-12]*/
-        nb_channels = strtol(arg, &tail, 10);
-        if (!errno && *tail == 'c' && *(tail + 1) == '\0' && nb_channels > 0 && nb_channels < 64) {
-            chlayout = 0;
-            av_log(log_ctx, AV_LOG_WARNING, "Deprecated channel count specification '%s'. This will stop working in releases made in 2018 and after.\n", arg);
-        } else {
-            av_log(log_ctx, AV_LOG_ERROR, "Invalid channel layout '%s'\n", arg);
-            return AVERROR(EINVAL);
-        }
+        av_log(log_ctx, AV_LOG_ERROR, "Invalid channel layout '%s'\n", arg);
+        return AVERROR(EINVAL);
     }
     if (!chlayout && !nret) {
         av_log(log_ctx, AV_LOG_ERROR, "Unknown channel layout '%s' is not supported.\n", arg);
diff --git a/tests/ref/fate/filter-formats b/tests/ref/fate/filter-formats
index ea85eed23d..17ff5b222f 100644
--- a/tests/ref/fate/filter-formats
+++ b/tests/ref/fate/filter-formats
@@ -75,7 +75,7 @@ quad(side)
 0 = ff_parse_channel_layout(0000000000000004,  1, 1c);
 0 = ff_parse_channel_layout(0000000000000003,  2, 2c);
 -1 = ff_parse_channel_layout(FFFFFFFFFFFFFFFF, -1, -1c);
-0 = ff_parse_channel_layout(0000000000000000, 60, 60c);
+-1 = ff_parse_channel_layout(FFFFFFFFFFFFFFFF, -1, 60c);
 -1 = ff_parse_channel_layout(FFFFFFFFFFFFFFFF, -1, 65c);
 0 = ff_parse_channel_layout(0000000000000000,  2, 2C);
 0 = ff_parse_channel_layout(0000000000000000, 60, 60C);