diff --git a/meta/recipes-rt/rt-tests/rt-tests_0.83.bb b/meta/recipes-rt/rt-tests/rt-tests_0.83.bb
index 6c4931e..e38ada9 100644
--- a/meta/recipes-rt/rt-tests/rt-tests_0.83.bb
+++ b/meta/recipes-rt/rt-tests/rt-tests_0.83.bb
@@ -18,8 +18,7 @@ SRC_URI = "git://github.com/clrkwllms/rt-tests.git \
 
 S = "${WORKDIR}/git"
 
-# need to append rt-tests' default CFLAGS to ours
-CFLAGS += "-I${S}/src/include -D_GNU_SOURCE -Wall -Wno-nonnulli"
+TARGET_CC_ARCH += "${LDFLAGS}"
 
 # calling 'uname -m' is broken on crossbuilds
 EXTRA_OEMAKE = "NUMA=0"