diff --git a/include/fwrite_le.h b/include/fwrite_le.h
index ec04e87..69e52b1 100644
--- a/include/fwrite_le.h
+++ b/include/fwrite_le.h
@@ -15,7 +15,7 @@
 #define ORDER_NATIVE_U32 0x01234567
 #define ORDER_LITTLE_ENDIAN_S4 "\x67\x45\x23\x01"
 #define ORDER_BIG_ENDIAN_S4 "\x01\x23\x45\x67"
-#define ifeq_u32_ret(lhs, rhs, value) if (!memcmp(lhs, rhs, 4)) return value;
+#define ifeq_b32_ret(lhs, rhs, value) if (!memcmp(lhs, rhs, 4)) return value;
 
 int detect_endianness(void);
 size_t fwrite_le(void* ptr, size_t size, size_t count, FILE* stream);
diff --git a/src/fwrite_le.c b/src/fwrite_le.c
index 0fe8ec6..473124c 100644
--- a/src/fwrite_le.c
+++ b/src/fwrite_le.c
@@ -4,8 +4,8 @@ int detect_endianness(void) {
 	volatile uint32_t native_order_value = ORDER_NATIVE_U32;
 	uint8_t* as_bytes = (uint8_t*)&native_order_value;
 
-	ifeq_u32_ret(as_bytes, ORDER_LITTLE_ENDIAN_S4, DETECTED_LITTLE_ENDIAN);
-	ifeq_u32_ret(as_bytes, ORDER_BIG_ENDIAN_S4,    DETECTED_BIG_ENDIAN   );
+	ifeq_b32_ret(as_bytes, ORDER_LITTLE_ENDIAN_S4, DETECTED_LITTLE_ENDIAN);
+	ifeq_b32_ret(as_bytes, ORDER_BIG_ENDIAN_S4,    DETECTED_BIG_ENDIAN   );
 	return UNSUPPORTED_ENDIANNESS;
 }