diff --git a/tools/aifc_decode.c b/tools/aifc_decode.c
index 19d13c6..c71103a 100644
--- a/tools/aifc_decode.c
+++ b/tools/aifc_decode.c
@@ -19,10 +19,17 @@ typedef unsigned int u32;
 typedef unsigned long long u64;
 typedef float f32;
 
+#if __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
+#define bswap16(x) x
+#define bswap32(x) x
+#define BSWAP16(x) x = x
+#define BSWAP32(x) x = x
+#else
 #define bswap16(x) __builtin_bswap16(x)
 #define bswap32(x) __builtin_bswap32(x)
 #define BSWAP16(x) x = __builtin_bswap16(x)
 #define BSWAP32(x) x = __builtin_bswap32(x)
+#endif
 #define BSWAP16_MANY(x, n) for (s32 _i = 0; _i < n; _i++) BSWAP16((x)[_i])
 
 #define NORETURN __attribute__((noreturn))
diff --git a/tools/aiff_extract_codebook.c b/tools/aiff_extract_codebook.c
index 78864e3..193e0b8 100644
--- a/tools/aiff_extract_codebook.c
+++ b/tools/aiff_extract_codebook.c
@@ -15,8 +15,13 @@ typedef int s32;
 typedef unsigned char u8;
 typedef unsigned int u32;
 
+#if __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
+#define BSWAP16(x)
+#define BSWAP32(x)
+#else
 #define BSWAP16(x) x = __builtin_bswap16(x)
 #define BSWAP32(x) x = __builtin_bswap32(x)
+#endif
 
 #define NORETURN __attribute__((noreturn))
 #define UNUSED __attribute__((unused))
diff --git a/tools/sdk-tools/adpcm/vadpcm.h b/tools/sdk-tools/adpcm/vadpcm.h
index cac4486..00f8942 100644
--- a/tools/sdk-tools/adpcm/vadpcm.h
+++ b/tools/sdk-tools/adpcm/vadpcm.h
@@ -14,7 +14,7 @@ typedef unsigned long long u64;
 typedef float f32;
 typedef double f64;
 
-#ifdef __sgi
+#if __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
 #  define BSWAP16(x)
 #  define BSWAP32(x)
 #  define BSWAP16_MANY(x, n)
diff --git a/tools/utils.c b/tools/utils.c
index 3ba6e3e..17258f9 100644
--- a/tools/utils.c
+++ b/tools/utils.c
@@ -82,6 +82,7 @@ void swap_bytes(unsigned char *data, long length)
 
 void reverse_endian(unsigned char *data, long length)
 {
+#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
    long i;
    unsigned char tmp;
    for (i = 0; i < length; i += 4) {
@@ -92,6 +93,7 @@ void reverse_endian(unsigned char *data, long length)
       data[i+1] = data[i+2];
       data[i+2] = tmp;
    }
+#endif
 }
 
 long filesize(const char *filename)