diff --git a/TestPrograms/test_x86_aes.cxx b/TestPrograms/test_x86_aes.cxx
index d162c0a5..b4d31f90 100644
--- a/TestPrograms/test_x86_aes.cxx
+++ b/TestPrograms/test_x86_aes.cxx
@@ -1,7 +1,8 @@
+#include <emmintrin.h>
 #include <wmmintrin.h>
 int main(int argc, char* argv[])
 {
-	__m128i x;
+	__m128i x = _mm_setzero_si128();
 	x=_mm_aesenc_si128(x,x);
 	x=_mm_aesenclast_si128(x,x);
 	x=_mm_aesdec_si128(x,x);
diff --git a/TestPrograms/test_x86_avx.cxx b/TestPrograms/test_x86_avx.cxx
index 5f80d2b7..ec17fb71 100644
--- a/TestPrograms/test_x86_avx.cxx
+++ b/TestPrograms/test_x86_avx.cxx
@@ -1,7 +1,7 @@
 #include <immintrin.h>
 int main(int argc, char* argv[])
 {
-	__m256d x;
+	__m256d x = _mm256_setzero_pd();
 	x=_mm256_addsub_pd(x,x);
 	return 0;
 }
diff --git a/TestPrograms/test_x86_avx2.cxx b/TestPrograms/test_x86_avx2.cxx
index 46e10895..073e9c6f 100644
--- a/TestPrograms/test_x86_avx2.cxx
+++ b/TestPrograms/test_x86_avx2.cxx
@@ -1,7 +1,7 @@
 #include <immintrin.h>
 int main(int argc, char* argv[])
 {
-	__m256i x;
+	__m256i x = _mm256_setzero_si256();
 	x=_mm256_add_epi64 (x,x);
 	return 0;
 }
diff --git a/TestPrograms/test_x86_clmul.cxx b/TestPrograms/test_x86_clmul.cxx
index 8366f099..84ee9595 100644
--- a/TestPrograms/test_x86_clmul.cxx
+++ b/TestPrograms/test_x86_clmul.cxx
@@ -1,7 +1,8 @@
+#include <emmintrin.h>
 #include <wmmintrin.h>
 int main(int argc, char* argv[])
 {
-	__m128i x;
+	__m128i x = _mm_setzero_si128();
 	x=_mm_clmulepi64_si128(x,x,0x11);
 	return 0;
 }
diff --git a/TestPrograms/test_x86_sha.cxx b/TestPrograms/test_x86_sha.cxx
index 9ed37462..8dff4702 100644
--- a/TestPrograms/test_x86_sha.cxx
+++ b/TestPrograms/test_x86_sha.cxx
@@ -1,7 +1,8 @@
+#include <emmintrin.h>
 #include <immintrin.h>
 int main(int argc, char* argv[])
 {
-	__m128i x;
+	__m128i x = _mm_setzero_si128();
 	x=_mm_sha1msg1_epu32(x,x);
 	x=_mm_sha1msg2_epu32(x,x);
 	x=_mm_sha1nexte_epu32(x,x);
diff --git a/TestPrograms/test_x86_sse2.cxx b/TestPrograms/test_x86_sse2.cxx
index 532dd55f..641ec2fa 100644
--- a/TestPrograms/test_x86_sse2.cxx
+++ b/TestPrograms/test_x86_sse2.cxx
@@ -1,7 +1,7 @@
 #include <emmintrin.h>
 int main(int argc, char* argv[])
 {
-	__m128i x;
+	__m128i x = _mm_setzero_si128();
 	x=_mm_add_epi64(x,x);
 	return 0;
 }
diff --git a/TestPrograms/test_x86_sse3.cxx b/TestPrograms/test_x86_sse3.cxx
index dad15b55..8dcbfb97 100644
--- a/TestPrograms/test_x86_sse3.cxx
+++ b/TestPrograms/test_x86_sse3.cxx
@@ -1,7 +1,8 @@
+#include <emmintrin.h>
 #include <pmmintrin.h>
 int main(int argc, char* argv[])
 {
-	__m128d x;
+	__m128d x = _mm_setzero_pd();
 	x=_mm_addsub_pd(x,x);
 	return 0;
 }
diff --git a/TestPrograms/test_x86_sse41.cxx b/TestPrograms/test_x86_sse41.cxx
index 19fdaa70..e3aee077 100644
--- a/TestPrograms/test_x86_sse41.cxx
+++ b/TestPrograms/test_x86_sse41.cxx
@@ -1,7 +1,10 @@
+#include <emmintrin.h>
 #include <smmintrin.h>
 int main(int argc, char* argv[])
 {
-	__m128i x, a, b;
+	__m128i x = _mm_setzero_si128();
+	__m128i a = _mm_setzero_si128();
+	__m128i b = _mm_setzero_si128();
 	x=_mm_blend_epi16(a,b,4);
 	return 0;
 }
diff --git a/TestPrograms/test_x86_ssse3.cxx b/TestPrograms/test_x86_ssse3.cxx
index 1a546b64..43bfc28e 100644
--- a/TestPrograms/test_x86_ssse3.cxx
+++ b/TestPrograms/test_x86_ssse3.cxx
@@ -1,7 +1,8 @@
+#include <emmintrin.h>
 #include <tmmintrin.h>
 int main(int argc, char* argv[])
 {
-	__m128i x;
+	__m128i x = _mm_setzero_si128();
 	x=_mm_alignr_epi8(x,x,2);
 	return 0;
 }