diff --git a/xpcom/reflect/xptcall/md/unix/moz.build b/xpcom/reflect/xptcall/md/unix/moz.build
index 7ab7e73654..4b44143ad8 100644
--- a/xpcom/reflect/xptcall/md/unix/moz.build
+++ b/xpcom/reflect/xptcall/md/unix/moz.build
@@ -136,7 +136,7 @@ if CONFIG['OS_ARCH'] in ('Linux', 'FreeBSD', 'NetBSD', 'OpenBSD'):
             ]
 
 if CONFIG['OS_TEST'] == 'powerpc':
-    if CONFIG['OS_ARCH'] in ('Linux', 'FreeBSD'):
+    if CONFIG['OS_ARCH'] in ('Linux', 'FreeBSD', 'NetBSD'):
         SOURCES += [
             'xptcinvoke_asm_ppc_linux.S',
             'xptcinvoke_ppc_linux.cpp',
@@ -145,7 +145,7 @@ if CONFIG['OS_TEST'] == 'powerpc':
         ]
 
 if CONFIG['OS_TEST'] in ('powerpc64', 'powerpc64le'):
-    if CONFIG['OS_ARCH'] in ('Linux', 'FreeBSD'):
+    if CONFIG['OS_ARCH'] in ('Linux', 'FreeBSD', 'NetBSD'):
           SOURCES += [
               'xptcinvoke_asm_ppc64_linux.S',
               'xptcinvoke_ppc64_linux.cpp',
@@ -198,7 +198,7 @@ if CONFIG['OS_ARCH'] == 'OpenBSD' and CONFIG['OS_TEST'] == 'sparc':
 # files for 64-bit SPARC with no ill effects, so basically the entire mess that
 # was there before is no longer needed.
 
-if CONFIG['OS_ARCH'] in ('OpenBSD', 'FreeBSD', 'SunOS', 'Linux') and CONFIG['OS_TEST'] == 'sparc64':
+if CONFIG['OS_ARCH'] in ('NetBSD', 'OpenBSD', 'FreeBSD', 'SunOS', 'Linux') and CONFIG['OS_TEST'] == 'sparc64':
     SOURCES += [
         'xptcinvoke_asm_sparc64_openbsd.s',
         'xptcinvoke_sparc64_openbsd.cpp',