diff --git a/fmt-c-writer.scm b/fmt-c-writer.scm
index 63039ff..aadac0e 100644
--- a/fmt-c-writer.scm
+++ b/fmt-c-writer.scm
@@ -120,10 +120,6 @@ forms, and what remains."
     ((|\||) 'bit-or)
     ((|\|\||) '%or)
     ((|\|=|) 'bit-or=)
-    ;; uh things we do for c89 compatibility
-    ((bool) 'int)
-    ((true) 1)
-    ((false) 0)
     (else
      (if (symbol? atom)
          (unkebabify atom)
diff --git a/sexc.scm b/sexc.scm
index 111e8f2..3bb54ae 100644
--- a/sexc.scm
+++ b/sexc.scm
@@ -176,6 +176,7 @@ status, which is ours to pass on."
 
 (define prelude
   '((include inttypes.h)
+    (include stdbool.h)
 
     (typedef u8 uint8-t)
     (typedef i8 int8-t)
diff --git a/tests/basic.scm b/tests/basic.scm
index 29fc1b3..3456f0b 100644
--- a/tests/basic.scm
+++ b/tests/basic.scm
@@ -31,10 +31,10 @@
   (test 'vector-ref (atom-to-fmt-c '¤))
   (test '%include (atom-to-fmt-c 'include))
 
-  ;; c89 stuff
-  (test 'int (atom-to-fmt-c 'bool))
-  (test 1 (atom-to-fmt-c 'true))
-  (test 0 (atom-to-fmt-c 'false))
+  ;; C99 onwards, true C spellings for bool
+  (test 'bool (atom-to-fmt-c 'bool))
+  (test 'true (atom-to-fmt-c 'true))
+  (test 'false (atom-to-fmt-c 'false))
 
   ;; dot-access -> %. member-access directive (kebab-converted operands)
   (test '(%. a b) (walk-expr '(dot-access a b)))
diff --git a/tests/fmt-c-writer.scm b/tests/fmt-c-writer.scm
index ba103c1..663fca4 100644
--- a/tests/fmt-c-writer.scm
+++ b/tests/fmt-c-writer.scm
@@ -150,7 +150,7 @@
   (test
    '(struct mega_kebab ((int a)
                         ((struct ((int year) (int month) (int day))) dob)
-                        ((%fun int ((int) (%array int))) min)))
+                        ((%fun bool ((int) (%array int))) min)))
    (walk-struct '(struct mega-kebab
                          ((a int)
                           (dob (struct ((year int)