diff --git a/src/dj.c b/src/dj.c
index f938ca9..8c9f327 100644
--- a/src/dj.c
+++ b/src/dj.c
@@ -59,11 +59,8 @@ static int write_flags = O_WRONLY | O_CREAT;
 
 #define MIN(a, b) (((a) < (b)) ? (a) : (b))
 
-/* Macro to check if fd is a std* file, e.g. stdin. */
-#define fdisstd(fd) \
-		((fd) == STDIN_FILENO \
-		|| (fd) == STDOUT_FILENO \
-		|| (fd) == STDERR_FILENO)
+/* Macro to check if fd is stdin or stdout */
+#define fdisstd(fd) ((fd) == STDIN_FILENO || (fd) == STDOUT_FILENO)
 
 /* Fills the unused portion of io's buffer with padding, updating io->bufuse.
  * Returns io. */
@@ -142,7 +139,6 @@ Io_fdseek(struct Io *io){
 	assert(io != NULL);
 	assert(io->fd != STDIN_FILENO  || io->fl == read_flags);
 	assert(io->fd != STDOUT_FILENO || io->fl == write_flags);
-	assert(io->fd != STDERR_FILENO || io->fl == write_flags);
 
 	if(io->seek == 0
 			|| (!fdisstd(io->fd) && lseek(io->fd, io->seek, SEEK_SET) != -1)){