diff --git a/ext/gd/libgd/gd_interpolation.c b/ext/gd/libgd/gd_interpolation.c
index 4aa2b79b7a7..b3f391e6d20 100644
--- a/ext/gd/libgd/gd_interpolation.c
+++ b/ext/gd/libgd/gd_interpolation.c
@@ -62,11 +62,6 @@ TODO:
 #include "gdhelpers.h"
 #include "gd_intern.h"
 
-#if defined(_MSC_VER) && (defined(_M_IX86) || defined(_M_X64))
-# pragma optimize("t", on)
-# include <emmintrin.h>
-#endif
-
 #ifndef MIN
 #define MIN(a,b) ((a)<(b)?(a):(b))
 #endif