diff --git a/include/u.h b/include/u.h
index 9ee7493b46..44bfcd63b2 100644
--- a/include/u.h
+++ b/include/u.h
@@ -194,6 +194,8 @@ typedef u64int uint64;
 #undef _NEEDUINT
 #undef _NEEDULONG
 
+#define getcallerpc(x)	__builtin_return_address(0)
+
 #ifndef SIGBUS
 #define SIGBUS SIGSEGV /* close enough */
 #endif