diff --git a/src/common/crypto.c b/src/common/crypto.c
index d5a5a9c1e288f792ebdaf47efd0a702e040f3452..4f5a14d6dc55f36532700838348213ccbbf972f2 100644
--- a/src/common/crypto.c
+++ b/src/common/crypto.c
@@ -1047,14 +1047,14 @@ int crypto_seed_rng()
   if (!provider_set) {
     if (!CryptAcquireContext(&provider, NULL, NULL, PROV_RSA_FULL, 0)) {
       if (GetLastError() != NTE_BAD_KEYSET) {
-	log_fn(LOG_ERR,"Can't get CryptoAPI provider [1]");
-	return -1;
+        log_fn(LOG_ERR,"Can't get CryptoAPI provider [1]");
+        return -1;
       }
       /* Yes, we need to try it twice. */
       if (!CryptAcquireContext(&provider, NULL, NULL, PROV_RSA_FULL,
-			       CRYPT_NEWKEYSET)) {
-	log_fn(LOG_ERR,"Can't get CryptoAPI provider [2]");
-	return -1;
+                               CRYPT_NEWKEYSET)) {
+        log_fn(LOG_ERR,"Can't get CryptoAPI provider [2]");
+        return -1;
       }
     }
     provider_set = 1;
diff --git a/src/common/crypto.h b/src/common/crypto.h
index 4ada97e519e9880bf88d4df57dc4e476f6cd9f71..f371f416ae39edcf20e006c7549d3be044750a73 100644
--- a/src/common/crypto.h
+++ b/src/common/crypto.h
@@ -74,10 +74,10 @@ typedef struct crypto_dh_env_st {
 crypto_dh_env_t *crypto_dh_new();
 int crypto_dh_get_bytes(crypto_dh_env_t *dh);
 int crypto_dh_get_public(crypto_dh_env_t *dh, char *pubkey_out,
-			 int pubkey_out_len);
+                         int pubkey_out_len);
 int crypto_dh_compute_secret(crypto_dh_env_t *dh,
-			     char *pubkey, int pubkey_len,
-			     char *secret_out, int secret_out_len);
+                             char *pubkey, int pubkey_len,
+                             char *secret_out, int secret_out_len);
 void crypto_dh_free(crypto_dh_env_t *dh);
 
 /* symmetric crypto */
diff --git a/src/common/fakepoll.c b/src/common/fakepoll.c
index 5b5d7daaf64947d55f22ece42347e168b2f1a7fa..2f91c1b45f81ef426827352f25de24042f6aa74e 100644
--- a/src/common/fakepoll.c
+++ b/src/common/fakepoll.c
@@ -32,7 +32,7 @@
 int
 tor_poll(struct pollfd *ufds, unsigned int nfds, int timeout)
 {
-	    unsigned int idx;
+        unsigned int idx;
         int maxfd, fd;
         int r;
 #ifdef MS_WINDOWS
diff --git a/src/common/util.c b/src/common/util.c
index 16e191d1405f2ee506b93c02820da03e1ecbdeff..98930a6397720bda3f4fac3921c4b049b7b4b507 100644
--- a/src/common/util.c
+++ b/src/common/util.c
@@ -527,9 +527,9 @@ int check_private_dir(const char *dirname, int create)
     }
     log(LOG_INFO, "Creating directory %s", dirname);
 #ifdef MS_WINDOWS
-	r = mkdir(dirname);
+    r = mkdir(dirname);
 #else
-	r = mkdir(dirname, 0700);
+    r = mkdir(dirname, 0700);
 #endif
     if (r) {
       log(LOG_WARN, "Error creating directory %s: %s", dirname,
@@ -877,12 +877,12 @@ int tor_inet_aton(const char *c, struct in_addr* addr)
   uint32_t r;
   assert(c && addr);
   if (strcmp(c, "255.255.255.255") == 0) {
-	addr->s_addr = 0xFFFFFFFFu;
-	return 1;
+    addr->s_addr = 0xFFFFFFFFu;
+    return 1;
   }
   r = inet_addr(c);
   if (r == INADDR_NONE)
-	return 0;
+    return 0;
   addr->s_addr = r;
   return 1;
 #endif