diff --git a/test/gtc/gtc_packing.cpp b/test/gtc/gtc_packing.cpp
index 5830999..86167c5 100644
--- a/test/gtc/gtc_packing.cpp
+++ b/test/gtc/gtc_packing.cpp
@@ -5,6 +5,8 @@
 #include <cstdio>
 #include <vector>
 
+#include <endian.h>
+
 void print_bits(float const& s)
 {
 	union
@@ -154,6 +156,7 @@ int test_U3x10_1x2()
 		Error += glm::all(glm::equal(v0, v1)) ? 0 : 1;
 	}
 
+#if BYTE_ORDER ==  LITTLE_ENDIAN
 	glm::u8vec4 const v0(0xff, 0x77, 0x0, 0x33);
 	glm::uint32 const p0 = *reinterpret_cast<glm::uint32 const*>(&v0[0]);
 	glm::uint32 const r0 = 0x330077ff;
@@ -165,7 +168,7 @@ int test_U3x10_1x2()
 	glm::uint32 const r1 = 0xc001dcff;
 
 	Error += p1 == r1 ? 0 : 1;
-
+#endif
 	return Error;
 }