Index: uspace/lib/c/include/stdbool.h
===================================================================
--- uspace/lib/c/include/stdbool.h	(revision 05922b3b4e59a7eee9af4c6ca418c2f6e0fd17d4)
+++ uspace/lib/c/include/stdbool.h	(revision 9cb221b37d68da2df3030745f97de46abfc21db1)
@@ -38,8 +38,10 @@
 #include <abi/bool.h>
 
+#ifndef __cplusplus
 #define false  0
 #define true   1
 
 #define __bool_true_false_are_defined  1
+#endif
 
 #endif