$NetBSD$

--- src/extensions/shmmodule.c.orig	2007-04-28 00:28:48.000000000 -0400
+++ src/extensions/shmmodule.c
@@ -129,6 +129,10 @@ Semaphore Objects:
 #define key __key
 #endif /* __GLIBC__ */
 
+#if defined(__NetBSD__)
+#define key _key
+#endif
+
 /*
 -- Exception type for errors detected by this module.
 */
