diff --git a/plugins/sudoers/rcstr.c b/plugins/sudoers/rcstr.c
index 0f8e1a1ad..33ad557bc 100644
--- a/plugins/sudoers/rcstr.c
+++ b/plugins/sudoers/rcstr.c
@@ -20,7 +20,11 @@
 
 #include <stdio.h>
 #include <stdlib.h>
-#include <stdbool.h>
+#ifdef HAVE_STDBOOL_H
+# include <stdbool.h>
+#else
+# include "compat/stdbool.h"
+#endif
 #ifdef HAVE_STRING_H
 # include <string.h>
 #endif /* HAVE_STRING_H */