diff --git a/av1/decoder/decodeframe.c b/av1/decoder/decodeframe.c
index 3f5afe9..0dafce7 100644
--- a/av1/decoder/decodeframe.c
+++ b/av1/decoder/decodeframe.c
@@ -4476,6 +4476,16 @@
     }
 
     cm->frame_type = (FRAME_TYPE)aom_rb_read_literal(rb, 2);  // 2 bits
+    if (pbi->sequence_header_changed) {
+      if (pbi->common.frame_type == KEY_FRAME) {
+        // This is the start of a new coded video sequence.
+        pbi->sequence_header_changed = 0;
+      } else {
+        aom_internal_error(&cm->error, AOM_CODEC_CORRUPT_FRAME,
+                           "Sequence header has changed without a keyframe.");
+      }
+    }
+
     cm->show_frame = aom_rb_read_bit(rb);
     if (seq_params->still_picture &&
         (cm->frame_type != KEY_FRAME || !cm->show_frame)) {
diff --git a/av1/decoder/obu.c b/av1/decoder/obu.c
index cf03ff1..44ecf81 100644
--- a/av1/decoder/obu.c
+++ b/av1/decoder/obu.c
@@ -741,15 +741,6 @@
           assert(rb.bit_offset == 0);
           rb.bit_offset = 8 * frame_header_size;
         }
-        if (pbi->sequence_header_changed) {
-          if (pbi->common.frame_type == KEY_FRAME) {
-            // This is the start of a new coded video sequence.
-            pbi->sequence_header_changed = 0;
-          } else {
-            cm->error.error_code = AOM_CODEC_UNSUP_BITSTREAM;
-            return -1;
-          }
-        }
 
         decoded_payload_size = frame_header_size;
         pbi->frame_header_size = frame_header_size;