diff --git a/library/x509_crt.c b/library/x509_crt.c
index 493d633..2e7701d 100644
--- a/library/x509_crt.c
+++ b/library/x509_crt.c
@@ -575,10 +575,10 @@
 
         /* Get extension ID */
         if( ( ret = mbedtls_asn1_get_tag( p, end_ext_data, &extn_oid.len,
-				  MBEDTLS_ASN1_OID ) ) != 0 )
+                                          MBEDTLS_ASN1_OID ) ) != 0 )
             return( MBEDTLS_ERR_X509_INVALID_EXTENSIONS + ret );
 
-	extn_oid.tag = MBEDTLS_ASN1_OID;
+        extn_oid.tag = MBEDTLS_ASN1_OID;
         extn_oid.p = *p;
         *p += extn_oid.len;
 
@@ -729,7 +729,7 @@
 
     memcpy( p, buf, crt->raw.len );
 
-    // Direct pointers to the new buffer 
+    // Direct pointers to the new buffer
     p += crt->raw.len - len;
     end = crt_end = p + len;