diff --git a/configure.ac b/configure.ac
index 6864a29..aa84ee5 100755
--- a/configure.ac
+++ b/configure.ac
@@ -436,6 +436,7 @@
 AC_HEADER_STDC
 AC_HEADER_TIME
 AC_HEADER_SYS_WAIT
+AC_HEADER_STDBOOL
 dnl AC_TYPE_PID_T
 AC_TYPE_UID_T
 AC_TYPE_MODE_T
diff --git a/lib/zebra.h b/lib/zebra.h
index 8586437..1ee5107 100644
--- a/lib/zebra.h
+++ b/lib/zebra.h
@@ -92,6 +92,9 @@
 #ifdef HAVE_INTTYPES_H
 #include <inttypes.h>
 #endif /* HAVE_INTTYPES_H */
+#ifdef HAVE_STDBOOL_H
+#include <stdbool.h>
+#endif
 
 /* machine dependent includes */
 #ifdef SUNOS_5