diff --git a/common/socket_helper.c b/common/socket_helper.c
index 897edf5..886c8d2 100644
--- a/common/socket_helper.c
+++ b/common/socket_helper.c
@@ -136,7 +136,7 @@ static char *read_body_by_content_length(int socket_fd, long content_length) {
     int bytes_read = 0;
     int write_offset = 0;
     while ((total_bytes_read += bytes_read = read(socket_fd, buffer, content_length)) <= content_length && bytes_read > 0) {
-        memcpy(result + write_offset, buffer, content_length);
+        memcpy(result + write_offset, buffer, bytes_read);
         write_offset += bytes_read;
         // If we've read exactly the number of bytes we need to, we don't need to wait for more data.
         if (total_bytes_read == content_length) {