Index: uspace/lib/c/include/bitops.h
===================================================================
--- uspace/lib/c/include/bitops.h	(revision 972c60ce6ab8b890f6d151170b7c14d742eaa9eb)
+++ uspace/lib/c/include/bitops.h	(revision ec6766aa1faf1678f9ffc187d4411072c8186426)
@@ -107,4 +107,6 @@
 }
 
+extern int __popcountsi2(int);
+
 #endif