diff --git a/implementations/racket/preserves/preserves-schema/parser.rkt b/implementations/racket/preserves/preserves-schema/parser.rkt
index 21f6c4d..f0f839d 100644
--- a/implementations/racket/preserves/preserves-schema/parser.rkt
+++ b/implementations/racket/preserves/preserves-schema/parser.rkt
@@ -59,7 +59,7 @@
                         [(AtomKind-Boolean) 'boolean?]
                         [(AtomKind-Float) 'float?]
                         [(AtomKind-Double) 'flonum?]
-                        [(AtomKind-SignedInteger) 'integer?]
+                        [(AtomKind-SignedInteger) 'exact-integer?]
                         [(AtomKind-String) 'string?]
                         [(AtomKind-ByteString) 'bytes?]
                         [(AtomKind-Symbol) 'symbol?])))]