diff --git a/libavcodec/h2645_parse.h b/libavcodec/h2645_parse.h
index 5f3e17a0f2..ca615d9f1b 100644
--- a/libavcodec/h2645_parse.h
+++ b/libavcodec/h2645_parse.h
@@ -97,7 +97,7 @@ static inline int get_nalsize(int nal_length_size, const uint8_t *buf,
 
     if (*buf_index >= buf_size - nal_length_size) {
         // the end of the buffer is reached, refill it
-        return AVERROR(EAGAIN);
+        return AVERROR_INVALIDDATA;
     }
 
     for (i = 0; i < nal_length_size; i++)