diff --git a/CHANGES b/CHANGES
index 36f4adf..a624dee 100644
--- a/CHANGES
+++ b/CHANGES
@@ -45,9 +45,6 @@ The following are the changes from calc version 2.14.3.5 to date:
     Fixed have_statfs optional executable file extension ${EXT{ in
     the ${UTIL_PROGS} make variable.
 
-    Prevented the "fake boolean value" when <stdbool.h> is missing,
-    from complicating C compilers post c17 standard.
-
     Test if <stdint.h> exists and set HAVE_STDINT_H accordingly
     in have_stdint.h.  Added HAVE_STDINT_H to allow one to force
     this value.
diff --git a/bool.h b/bool.h
index 5e0d97a..e769b1e 100644
--- a/bool.h
+++ b/bool.h
@@ -42,9 +42,7 @@
 #if !defined(HAVE_STDBOOL_H)
 
 /* fake a <stdbool.h> header file */
-#if __STDC_VERSION__ <= 201710
-typedef unsigned int bool;	/* fake boolean typedef */
-#endif /* __STDC_VERSION__ <= 201710 */
+typedef unsigned char bool;	/* fake boolean typedef */
 #undef true
 #define true ((bool)(1))
 #undef false