diff --git a/programs/x509/crl_app.c b/programs/x509/crl_app.c
index 0a6d261..4b98757 100644
--- a/programs/x509/crl_app.c
+++ b/programs/x509/crl_app.c
@@ -27,11 +27,11 @@
 
 #if !defined(MBEDTLS_BIGNUM_C) || !defined(MBEDTLS_RSA_C) ||  \
     !defined(MBEDTLS_X509_CRL_PARSE_C) || !defined(MBEDTLS_FS_IO)
-int main( void )
+int main(void)
 {
     mbedtls_printf("MBEDTLS_BIGNUM_C and/or MBEDTLS_RSA_C and/or "
-           "MBEDTLS_X509_CRL_PARSE_C and/or MBEDTLS_FS_IO not defined.\n");
-    mbedtls_exit( 0 );
+                   "MBEDTLS_X509_CRL_PARSE_C and/or MBEDTLS_FS_IO not defined.\n");
+    mbedtls_exit(0);
 }
 #else
 
@@ -54,12 +54,11 @@
 /*
  * global options
  */
-struct options
-{
+struct options {
     const char *filename;       /* filename of the certificate file     */
 } opt;
 
-int main( int argc, char *argv[] )
+int main(int argc, char *argv[])
 {
     int ret = 1;
     int exit_code = MBEDTLS_EXIT_FAILURE;
@@ -71,72 +70,70 @@
     /*
      * Set to sane values
      */
-    mbedtls_x509_crl_init( &crl );
+    mbedtls_x509_crl_init(&crl);
 
-    if( argc == 0 )
-    {
-    usage:
-        mbedtls_printf( USAGE );
+    if (argc == 0) {
+usage:
+        mbedtls_printf(USAGE);
         goto exit;
     }
 
     opt.filename            = DFL_FILENAME;
 
-    for( i = 1; i < argc; i++ )
-    {
+    for (i = 1; i < argc; i++) {
         p = argv[i];
-        if( ( q = strchr( p, '=' ) ) == NULL )
+        if ((q = strchr(p, '=')) == NULL) {
             goto usage;
+        }
         *q++ = '\0';
 
-        if( strcmp( p, "filename" ) == 0 )
+        if (strcmp(p, "filename") == 0) {
             opt.filename = q;
-        else
+        } else {
             goto usage;
+        }
     }
 
     /*
      * 1.1. Load the CRL
      */
-    mbedtls_printf( "\n  . Loading the CRL ..." );
-    fflush( stdout );
+    mbedtls_printf("\n  . Loading the CRL ...");
+    fflush(stdout);
 
-    ret = mbedtls_x509_crl_parse_file( &crl, opt.filename );
+    ret = mbedtls_x509_crl_parse_file(&crl, opt.filename);
 
-    if( ret != 0 )
-    {
-        mbedtls_printf( " failed\n  !  mbedtls_x509_crl_parse_file returned %d\n\n", ret );
-        mbedtls_x509_crl_free( &crl );
+    if (ret != 0) {
+        mbedtls_printf(" failed\n  !  mbedtls_x509_crl_parse_file returned %d\n\n", ret);
+        mbedtls_x509_crl_free(&crl);
         goto exit;
     }
 
-    mbedtls_printf( " ok\n" );
+    mbedtls_printf(" ok\n");
 
     /*
      * 1.2 Print the CRL
      */
-    mbedtls_printf( "  . CRL information    ...\n" );
-    ret = mbedtls_x509_crl_info( (char *) buf, sizeof( buf ) - 1, "      ", &crl );
-    if( ret == -1 )
-    {
-        mbedtls_printf( " failed\n  !  mbedtls_x509_crl_info returned %d\n\n", ret );
-        mbedtls_x509_crl_free( &crl );
+    mbedtls_printf("  . CRL information    ...\n");
+    ret = mbedtls_x509_crl_info((char *) buf, sizeof(buf) - 1, "      ", &crl);
+    if (ret == -1) {
+        mbedtls_printf(" failed\n  !  mbedtls_x509_crl_info returned %d\n\n", ret);
+        mbedtls_x509_crl_free(&crl);
         goto exit;
     }
 
-    mbedtls_printf( "%s\n", buf );
+    mbedtls_printf("%s\n", buf);
 
     exit_code = MBEDTLS_EXIT_SUCCESS;
 
 exit:
-    mbedtls_x509_crl_free( &crl );
+    mbedtls_x509_crl_free(&crl);
 
 #if defined(_WIN32)
-    mbedtls_printf( "  + Press Enter to exit this program.\n" );
-    fflush( stdout ); getchar();
+    mbedtls_printf("  + Press Enter to exit this program.\n");
+    fflush(stdout); getchar();
 #endif
 
-    mbedtls_exit( exit_code );
+    mbedtls_exit(exit_code);
 }
 #endif /* MBEDTLS_BIGNUM_C && MBEDTLS_RSA_C && MBEDTLS_X509_CRL_PARSE_C &&
           MBEDTLS_FS_IO */