diff --git a/programs/x509/load_roots.c b/programs/x509/load_roots.c
index b8b0ecd..237bd7c 100644
--- a/programs/x509/load_roots.c
+++ b/programs/x509/load_roots.c
@@ -50,11 +50,11 @@
 
 #if !defined(MBEDTLS_X509_CRT_PARSE_C) || !defined(MBEDTLS_FS_IO) ||  \
     !defined(MBEDTLS_TIMING_C)
-int main( void )
+int main(void)
 {
     mbedtls_printf("MBEDTLS_X509_CRT_PARSE_C and/or MBEDTLS_FS_IO and/or "
-           "MBEDTLS_TIMING_C not defined.\n");
-    mbedtls_exit( 0 );
+                   "MBEDTLS_TIMING_C not defined.\n");
+    mbedtls_exit(0);
 }
 #else
 
@@ -80,55 +80,51 @@
 /*
  * global options
  */
-struct options
-{
+struct options {
     const char **filenames;     /* NULL-terminated list of file names */
     unsigned iterations;        /* Number of iterations to time */
     int prime_cache;            /* Prime the disk read cache? */
 } opt;
 
 
-int read_certificates( const char *const *filenames )
+int read_certificates(const char *const *filenames)
 {
     mbedtls_x509_crt cas;
     int ret = 0;
     const char *const *cur;
 
-    mbedtls_x509_crt_init( &cas );
+    mbedtls_x509_crt_init(&cas);
 
-    for( cur = filenames; *cur != NULL; cur++ )
-    {
-        ret = mbedtls_x509_crt_parse_file( &cas, *cur );
-        if( ret != 0 )
-        {
+    for (cur = filenames; *cur != NULL; cur++) {
+        ret = mbedtls_x509_crt_parse_file(&cas, *cur);
+        if (ret != 0) {
 #if defined(MBEDTLS_ERROR_C) || defined(MBEDTLS_ERROR_STRERROR_DUMMY)
             char error_message[200];
-            mbedtls_strerror( ret, error_message, sizeof( error_message ) );
-            printf( "\n%s: -0x%04x (%s)\n",
-                    *cur, (unsigned) -ret, error_message );
+            mbedtls_strerror(ret, error_message, sizeof(error_message));
+            printf("\n%s: -0x%04x (%s)\n",
+                   *cur, (unsigned) -ret, error_message);
 #else
-            printf( "\n%s: -0x%04x\n",
-                    *cur, (unsigned) -ret );
+            printf("\n%s: -0x%04x\n",
+                   *cur, (unsigned) -ret);
 #endif
             goto exit;
         }
     }
 
 exit:
-    mbedtls_x509_crt_free( &cas );
-    return( ret == 0 );
+    mbedtls_x509_crt_free(&cas);
+    return ret == 0;
 }
 
-int main( int argc, char *argv[] )
+int main(int argc, char *argv[])
 {
     int exit_code = MBEDTLS_EXIT_FAILURE;
     unsigned i, j;
     struct mbedtls_timing_hr_time timer;
     unsigned long ms;
 
-    if( argc <= 1 )
-    {
-        mbedtls_printf( USAGE );
+    if (argc <= 1) {
+        mbedtls_printf(USAGE);
         goto exit;
     }
 
@@ -136,66 +132,61 @@
     opt.iterations = DFL_ITERATIONS;
     opt.prime_cache = DFL_PRIME_CACHE;
 
-    for( i = 1; i < (unsigned) argc; i++ )
-    {
+    for (i = 1; i < (unsigned) argc; i++) {
         char *p = argv[i];
         char *q = NULL;
 
-        if( strcmp( p, "--" ) == 0 )
+        if (strcmp(p, "--") == 0) {
             break;
-        if( ( q = strchr( p, '=' ) ) == NULL )
+        }
+        if ((q = strchr(p, '=')) == NULL) {
             break;
+        }
         *q++ = '\0';
 
-        for( j = 0; p + j < q; j++ )
-        {
-            if( argv[i][j] >= 'A' && argv[i][j] <= 'Z' )
+        for (j = 0; p + j < q; j++) {
+            if (argv[i][j] >= 'A' && argv[i][j] <= 'Z') {
                 argv[i][j] |= 0x20;
+            }
         }
 
-        if( strcmp( p, "iterations" ) == 0 )
-        {
-            opt.iterations = atoi( q );
-        }
-        else if( strcmp( p, "prime" ) == 0 )
-        {
-            opt.iterations = atoi( q ) != 0;
-        }
-        else
-        {
-            mbedtls_printf( "Unknown option: %s\n", p );
-            mbedtls_printf( USAGE );
+        if (strcmp(p, "iterations") == 0) {
+            opt.iterations = atoi(q);
+        } else if (strcmp(p, "prime") == 0) {
+            opt.iterations = atoi(q) != 0;
+        } else {
+            mbedtls_printf("Unknown option: %s\n", p);
+            mbedtls_printf(USAGE);
             goto exit;
         }
     }
 
-    opt.filenames = (const char**) argv + i;
-    if( *opt.filenames == 0 )
-    {
-        mbedtls_printf( "Missing list of certificate files to parse\n" );
+    opt.filenames = (const char **) argv + i;
+    if (*opt.filenames == 0) {
+        mbedtls_printf("Missing list of certificate files to parse\n");
         goto exit;
     }
 
-    mbedtls_printf( "Parsing %u certificates", argc - i );
-    if( opt.prime_cache )
-    {
-        if( ! read_certificates( opt.filenames ) )
+    mbedtls_printf("Parsing %u certificates", argc - i);
+    if (opt.prime_cache) {
+        if (!read_certificates(opt.filenames)) {
             goto exit;
-        mbedtls_printf( " " );
+        }
+        mbedtls_printf(" ");
     }
 
-    (void) mbedtls_timing_get_timer( &timer, 1 );
-    for( i = 1; i <= opt.iterations; i++ )
-    {
-        if( ! read_certificates( opt.filenames ) )
+    (void) mbedtls_timing_get_timer(&timer, 1);
+    for (i = 1; i <= opt.iterations; i++) {
+        if (!read_certificates(opt.filenames)) {
             goto exit;
-        mbedtls_printf( "." );
+        }
+        mbedtls_printf(".");
     }
-    ms = mbedtls_timing_get_timer( &timer, 0 );
-    mbedtls_printf( "\n%u iterations -> %lu ms\n", opt.iterations, ms );
+    ms = mbedtls_timing_get_timer(&timer, 0);
+    mbedtls_printf("\n%u iterations -> %lu ms\n", opt.iterations, ms);
     exit_code = MBEDTLS_EXIT_SUCCESS;
 
 exit:
-    mbedtls_exit( exit_code );
+    mbedtls_exit(exit_code);
 }
 #endif /* necessary configuration */