diff --git a/Source/Core/VideoCommon/Src/TextureDecoder.cpp b/Source/Core/VideoCommon/Src/TextureDecoder.cpp
index 5d3f42662f..e19eb94d20 100644
--- a/Source/Core/VideoCommon/Src/TextureDecoder.cpp
+++ b/Source/Core/VideoCommon/Src/TextureDecoder.cpp
@@ -352,8 +352,8 @@ PC_TexFormat TexDecoder_Decode(u8 *dst, const u8 *src, int width, int height, in
         return PC_TEX_FMT_BGRA32;
     case GX_TF_I4:
         {
-//Works in GCC 4.3 and above, possibly 4.2 and above
-#if (defined(_WIN32) || (__GNUC__ == 4 && __GNUC_MINOR__ >= 3))
+//Works in GCC 4.3.2 and above, possibly 4.3.1 and above
+#if (defined(_WIN32) || (defined (_M_X64) && !defined(_WIN32)))
 			__m128i Lmask = _mm_set1_epi8 (0x0F);
 			__m128i Hmask = _mm_set1_epi8 (0xF0);
 			__m128i* sseSrc  = (__m128i *)src;
@@ -425,7 +425,7 @@ PC_TexFormat TexDecoder_Decode(u8 *dst, const u8 *src, int width, int height, in
         return PC_TEX_FMT_BGRA32;
     case GX_TF_I8:  // speed critical
 		{
-#ifdef _WIN32
+#if (defined(_WIN32) || (defined (_M_X64) && !defined(_WIN32)))
 			__m128i *sseSrc  = (__m128i *)src;
 			__m128i *sseDst  = (__m128i *)dst;
             for (int y = 0; y < height; y += 4)