diff --git a/alg/sha256_sse2.c b/alg/sha256_sse2.c
index d2575534..0dfc04be 100644
--- a/alg/sha256_sse2.c
+++ b/alg/sha256_sse2.c
@@ -21,7 +21,7 @@ mm_bswap_epi32(__m128i a)
 {
 
 	/* Swap bytes in each 16-bit word. */
-        a = _mm_or_si128(_mm_slli_epi16(a, 8), _mm_srli_epi16(a, 8));
+	a = _mm_or_si128(_mm_slli_epi16(a, 8), _mm_srli_epi16(a, 8));
 
 	/* Swap all 16-bit words. */
 	a = _mm_shufflelo_epi16(a, _MM_SHUFFLE(2, 3, 0, 1));
diff --git a/netbuf/netbuf_read.c b/netbuf/netbuf_read.c
index f569df80..04d715a8 100644
--- a/netbuf/netbuf_read.c
+++ b/netbuf/netbuf_read.c
@@ -297,7 +297,7 @@ void
 netbuf_read_free(struct netbuf_read * R)
 {
 
-        /* Behave consistently with free(NULL). */
+	/* Behave consistently with free(NULL). */
 	if (R == NULL)
 		return;
 
diff --git a/netbuf/netbuf_write.c b/netbuf/netbuf_write.c
index 0c36927a..18aeee4f 100644
--- a/netbuf/netbuf_write.c
+++ b/netbuf/netbuf_write.c
@@ -351,7 +351,7 @@ netbuf_write_free(struct netbuf_write * W)
 {
 	struct writebuf * WB;
 
-        /* Behave consistently with free(NULL). */
+	/* Behave consistently with free(NULL). */
 	if (W == NULL)
 		return;