diff --git a/src/ikarus.boot b/src/ikarus.boot
index 6bdf766..cd7db54 100644
Binary files a/src/ikarus.boot and b/src/ikarus.boot differ
diff --git a/src/makefile.ss b/src/makefile.ss
index 6783486..74919ef 100755
--- a/src/makefile.ss
+++ b/src/makefile.ss
@@ -393,6 +393,7 @@
     [bignum?                 i]
     [ratnum?                 i]
     [integer?                i r]
+    [exact?                  i r]
     [rational?               i r]
     [flonum?                 i]
     [positive?               i r]