diff --git a/TestPrograms/test_ppc_aes.cxx b/TestPrograms/test_ppc_aes.cxx
index 9e8690bb..64acfb81 100644
--- a/TestPrograms/test_ppc_aes.cxx
+++ b/TestPrograms/test_ppc_aes.cxx
@@ -1,7 +1,7 @@
 #include <altivec.h>
 int main(int argc, char* argv[])
 {
-#if defined(__ibmxl__)
+#if defined(__ibmxl__) || (defined(_AIX) && defined(__xlC__))
 	__vector unsigned char x;
 	x=__vcipher(x,x);
 	x=__vcipherlast(x,x);
diff --git a/TestPrograms/test_ppc_power7.cxx b/TestPrograms/test_ppc_power7.cxx
index 1e16f3e6..0cfeb4f1 100644
--- a/TestPrograms/test_ppc_power7.cxx
+++ b/TestPrograms/test_ppc_power7.cxx
@@ -1,7 +1,6 @@
 #include <altivec.h>
 int main(int argc, char* argv[])
 {
-	__vector unsigned int z;
 #if defined(__xlc__) || defined(__xlC__) || defined(__clang__)
 	__vector unsigned char x;
 	x=vec_xl(0, (unsigned char*)argv[0]);
diff --git a/TestPrograms/test_ppc_power8.cxx b/TestPrograms/test_ppc_power8.cxx
index eb32e8c4..808cb907 100644
--- a/TestPrograms/test_ppc_power8.cxx
+++ b/TestPrograms/test_ppc_power8.cxx
@@ -1,7 +1,7 @@
 #include <altivec.h>
 int main(int argc, char* argv[])
 {
-	__vector unsigned long long z;
+	__vector unsigned long long z = {1, 2};
 	z=vec_add(z,z);
 	return 0;
 }