diff --git a/scheme-core/aliases.scm b/scheme-core/aliases.scm
index e78510b..f58707f 100644
--- a/scheme-core/aliases.scm
+++ b/scheme-core/aliases.scm
@@ -292,5 +292,4 @@
     (with-output-to b (thunk))
     (io.tostring! b)))
 
-(define (read-u8) (io.read *input-stream* 'uint8))
 (define modulo mod)