diff --git a/library/bn_mul.h b/library/bn_mul.h
index b7e9690..307c241 100644
--- a/library/bn_mul.h
+++ b/library/bn_mul.h
@@ -47,36 +47,36 @@
  */
 #if defined(MBEDTLS_HAVE_INT32)
 
-#define MBEDTLS_BYTES_TO_T_UINT_4( a, b, c, d )               \
-    ( (mbedtls_mpi_uint) (a) <<  0 ) |                        \
-    ( (mbedtls_mpi_uint) (b) <<  8 ) |                        \
-    ( (mbedtls_mpi_uint) (c) << 16 ) |                        \
-    ( (mbedtls_mpi_uint) (d) << 24 )
+#define MBEDTLS_BYTES_TO_T_UINT_4(a, b, c, d)               \
+    ((mbedtls_mpi_uint) (a) <<  0) |                        \
+    ((mbedtls_mpi_uint) (b) <<  8) |                        \
+    ((mbedtls_mpi_uint) (c) << 16) |                        \
+    ((mbedtls_mpi_uint) (d) << 24)
 
-#define MBEDTLS_BYTES_TO_T_UINT_2( a, b )                   \
-    MBEDTLS_BYTES_TO_T_UINT_4( a, b, 0, 0 )
+#define MBEDTLS_BYTES_TO_T_UINT_2(a, b)                   \
+    MBEDTLS_BYTES_TO_T_UINT_4(a, b, 0, 0)
 
-#define MBEDTLS_BYTES_TO_T_UINT_8( a, b, c, d, e, f, g, h ) \
-    MBEDTLS_BYTES_TO_T_UINT_4( a, b, c, d ),                \
-    MBEDTLS_BYTES_TO_T_UINT_4( e, f, g, h )
+#define MBEDTLS_BYTES_TO_T_UINT_8(a, b, c, d, e, f, g, h) \
+    MBEDTLS_BYTES_TO_T_UINT_4(a, b, c, d),                \
+    MBEDTLS_BYTES_TO_T_UINT_4(e, f, g, h)
 
 #else /* 64-bits */
 
-#define MBEDTLS_BYTES_TO_T_UINT_8( a, b, c, d, e, f, g, h )   \
-    ( (mbedtls_mpi_uint) (a) <<  0 ) |                        \
-    ( (mbedtls_mpi_uint) (b) <<  8 ) |                        \
-    ( (mbedtls_mpi_uint) (c) << 16 ) |                        \
-    ( (mbedtls_mpi_uint) (d) << 24 ) |                        \
-    ( (mbedtls_mpi_uint) (e) << 32 ) |                        \
-    ( (mbedtls_mpi_uint) (f) << 40 ) |                        \
-    ( (mbedtls_mpi_uint) (g) << 48 ) |                        \
-    ( (mbedtls_mpi_uint) (h) << 56 )
+#define MBEDTLS_BYTES_TO_T_UINT_8(a, b, c, d, e, f, g, h)   \
+    ((mbedtls_mpi_uint) (a) <<  0) |                        \
+    ((mbedtls_mpi_uint) (b) <<  8) |                        \
+    ((mbedtls_mpi_uint) (c) << 16) |                        \
+    ((mbedtls_mpi_uint) (d) << 24) |                        \
+    ((mbedtls_mpi_uint) (e) << 32) |                        \
+    ((mbedtls_mpi_uint) (f) << 40) |                        \
+    ((mbedtls_mpi_uint) (g) << 48) |                        \
+    ((mbedtls_mpi_uint) (h) << 56)
 
-#define MBEDTLS_BYTES_TO_T_UINT_4( a, b, c, d )             \
-    MBEDTLS_BYTES_TO_T_UINT_8( a, b, c, d, 0, 0, 0, 0 )
+#define MBEDTLS_BYTES_TO_T_UINT_4(a, b, c, d)             \
+    MBEDTLS_BYTES_TO_T_UINT_8(a, b, c, d, 0, 0, 0, 0)
 
-#define MBEDTLS_BYTES_TO_T_UINT_2( a, b )                   \
-    MBEDTLS_BYTES_TO_T_UINT_8( a, b, 0, 0, 0, 0, 0, 0 )
+#define MBEDTLS_BYTES_TO_T_UINT_2(a, b)                   \
+    MBEDTLS_BYTES_TO_T_UINT_8(a, b, 0, 0, 0, 0, 0, 0)
 
 #endif /* bits in mbedtls_mpi_uint */