diff --git a/meta/recipes-devtools/unfs3/unfs3_0.9.22.r497.bb b/meta/recipes-devtools/unfs3/unfs3_0.9.22.r497.bb
index 8a76e5d0e8..a3d3160b97 100644
--- a/meta/recipes-devtools/unfs3/unfs3_0.9.22.r497.bb
+++ b/meta/recipes-devtools/unfs3/unfs3_0.9.22.r497.bb
@@ -36,8 +36,8 @@ BBCLASSEXTEND = "native nativesdk"
 
 inherit autotools
 EXTRA_OECONF_append_class-native = " --sbindir=${bindir}"
-CFLAGS += " -I${STAGING_INCDIR}/tirpc"
-LDFLAGS += " -ltirpc"
+CFLAGS_append = " -I${STAGING_INCDIR}/tirpc"
+LDFLAGS_append = " -ltirpc"
 
 # Turn off these header detects else the inode search
 # will walk entire file systems and this is a real problem