diff --git a/config.h.in b/config.h.in
index 04f5dc5..b7f7d75 100644
--- a/config.h.in
+++ b/config.h.in
@@ -32,6 +32,9 @@
 /* Define to 1 if you have the <stdarg.h> header file. */
 #undef HAVE_STDARG_H
 
+/* Define to 1 if you have the <stdbool.h> header file. */
+#undef HAVE_STDBOOL_H
+
 /* Define to 1 if you have the <stdint.h> header file. */
 #undef HAVE_STDINT_H
 
diff --git a/config.h.win32 b/config.h.win32
index ec3a84a..cd9efce 100644
--- a/config.h.win32
+++ b/config.h.win32
@@ -57,6 +57,9 @@
 /* Define to 1 if you have the <stdarg.h> header file. */
 #define HAVE_STDARG_H 1
 
+/* Define to 1 if you have the <stdbool.h> header file. */
+#undef HAVE_STDBOOL_H
+
 /* Define to 1 if you have the `strerror' function. */
 #define HAVE_STRERROR 1