diff --git a/H/Yap.h b/H/Yap.h
index 35684a574..a965a598e 100755
--- a/H/Yap.h
+++ b/H/Yap.h
@@ -683,7 +683,7 @@ typedef enum
 	if you place things in the lower addresses (power to the libc people).
 */
 
-#if (defined(_AIX) || (defined(__APPLE__) && !defined(__LP64__)) || defined(_WIN32) || defined(sparc) || defined(__sparc) || defined(mips) || defined(__FreeBSD__) || defined(_POWER) || defined(__POWERPC__) || defined(__linux__) || defined(IN_SECOND_QUADRANT) || defined(__CYGWIN__))
+#if (defined(_AIX) || (defined(__APPLE__) && !defined(__LP64__)) || defined(_WIN32) || defined(sparc) || defined(__sparc) || defined(mips) || defined(__FreeBSD__) || defined(_POWER) || defined(__POWERPC__) || defined(__linux__) || defined(IN_SECOND_QUADRANT) || defined(__CYGWIN__)) || defined(__NetBSD__)
 #define USE_LOW32_TAGS 1
 #endif