diff --git a/config.h b/config.h
index 8e6da20..8e5c6a4 100644
--- a/config.h
+++ b/config.h
@@ -60,9 +60,6 @@
 /* Define to 1 if you have the <unistd.h> header file. */
 #define HAVE_UNISTD_H 1
 
-/* Define to 1 if the system has the type `_Bool'. */
-#define HAVE__BOOL 1
-
 /* Define to the sub-directory in which libtool stores uninstalled libraries.
    */
 #define LT_OBJDIR ".libs/"