diff --git a/nsprpub/pr/src/io/prprf.c b/nsprpub/pr/src/io/prprf.c
index c2c126791d7..1da92e848f8 100644
--- a/nsprpub/pr/src/io/prprf.c
+++ b/nsprpub/pr/src/io/prprf.c
@@ -35,7 +35,8 @@
 ** Note: on some platforms va_list is defined as an array,
 ** and requires array notation.
 */
-#if (defined(LINUX) && defined(__powerpc__)) || defined(WIN16) || defined(QNX)
+#if (defined(LINUX) && defined(__powerpc__)) || defined(WIN16) || \
+    defined(QNX) || (defined(__NetBSD__) && defined(__powerpc__))
 #define VARARGS_ASSIGN(foo, bar) foo[0] = bar[0]
 #else
 #define VARARGS_ASSIGN(foo, bar) (foo) = (bar)