diff --git a/Source/Core/VideoCommon/Src/TextureDecoder.cpp b/Source/Core/VideoCommon/Src/TextureDecoder.cpp
index 2dc9aa99ec..e859d86815 100644
--- a/Source/Core/VideoCommon/Src/TextureDecoder.cpp
+++ b/Source/Core/VideoCommon/Src/TextureDecoder.cpp
@@ -352,7 +352,7 @@ PC_TexFormat TexDecoder_Decode(u8 *dst, const u8 *src, int width, int height, in
         return PC_TEX_FMT_BGRA32;
     case GX_TF_I4:
         {
-#if 1
+#ifdef _WIN32
 			__m128i Lmask = _mm_set1_epi8 (0x0F);
 			__m128i Hmask = _mm_set1_epi8 (0xF0);
 			__m128i* sseSrc  = (__m128i *)src;
@@ -424,7 +424,7 @@ 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
 		{
-#if 1
+#ifdef _WIN32
 			__m128i *sseSrc  = (__m128i *)src;
 			__m128i *sseDst  = (__m128i *)dst;
             for (int y = 0; y < height; y += 4)