diff --git a/foreign/c/primitives/kawa.scm b/foreign/c/primitives/kawa.scm
index 19a62aa..b7b5824 100644
--- a/foreign/c/primitives/kawa.scm
+++ b/foreign/c/primitives/kawa.scm
@@ -8,7 +8,7 @@
     (cond ((equal? type 'byte)
            (java.lang.Byte value))
           ((equal? type 'uint8)
-           (java.lang.Int value))
+           (java.lang.Byte value))
           ((equal? type 'short)
            (java.lang.Short value))
           ((equal? type 'unsigned-short)