diff --git a/lib/setup.h b/lib/setup.h
index aa5f9dbac238fc4df7dee542effeeaea685f72f6..ecb3dd5b0653bb0a439f9a06f111854eba7cc479 100644
--- a/lib/setup.h
+++ b/lib/setup.h
@@ -57,6 +57,10 @@
 #endif
 #endif
 
+#ifndef __cplusplus        /* (rabe) */
+typedef char bool;
+#endif                     /* (rabe) */
+
 #include <stdio.h>
 #ifndef OS
 #ifdef WIN32