diff --git a/src/real/prim.h b/src/real/prim.h
index 4a56967a..30f75acc 100644
--- a/src/real/prim.h
+++ b/src/real/prim.h
@@ -52,20 +52,6 @@ double __kernel_sin(double x, double y, int iy);
 double __kernel_tan(double x, double y, int iy);
 int __kernel_rem_pio2(double* x, double* y, int e0, int nx, int prec, const int* ipio2);
 
-/* Detect LE CPUs using compiler macro */
-#if !defined(__IEEE_LITTLE_ENDIAN) && !defined(__IEEE_BIG_ENDIAN)
-#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
-#define __IEEE_LITTLE_ENDIAN
-#endif
-#endif
-
-/* Detect BE CPUs using compiler macro */
-#if !defined(__IEEE_LITTLE_ENDIAN) && !defined(__IEEE_BIG_ENDIAN)
-#if __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
-#define __IEEE_BIG_ENDIAN
-#endif
-#endif
-
 /* Detect ARM CPUs */
 #if !defined(__IEEE_LITTLE_ENDIAN) && !defined(__IEEE_BIG_ENDIAN)
 #if defined(__arm__)          || defined(__ARM_ARCH_2__)    || \