diff --git a/TestPrograms/test_power8.cxx b/TestPrograms/test_power8.cxx
index 9e864e10..09412912 100644
--- a/TestPrograms/test_power8.cxx
+++ b/TestPrograms/test_power8.cxx
@@ -8,7 +8,7 @@ int main(int argc, char* argv[])
 	x=__vcipherlast(x,x);
 	x=__vncipher(x,x);
 	x=__vncipherlast(x,x);
-#elif defined(CRYPTOPP_GCC_VERSION)
+#elif defined(__GNUC__)
 	__vector unsigned long long x;
 	x=__builtin_crypto_vcipher(x,x);
 	x=__builtin_crypto_vcipherlast(x,x);