diff --git a/util.c b/util.c
index de763b1..94414a9 100644
--- a/util.c
+++ b/util.c
@@ -142,7 +142,7 @@ int challenge_response(YK_KEY *yk, int slot,
 
 	if (res_size < sizeof(64 + 16))
 	  return 0;
-	
+
 	memset(response, 0, sizeof(response));
 
 	if (verbose) {
@@ -198,10 +198,10 @@ get_user_challenge_file(YK_KEY *yk, const char *chalresp_path, const char *usern
    * which therefor can't be encrypted. If an encrypted home directory is used,
    * the option chalresp_path can be used to point to a system-wide directory.
    */
-  
+
   const char *filename; /* not including directory */
   unsigned int serial = 0;
-  
+
   if (! yk_get_serial(yk, 0, 0, &serial)) {
     D (("Failed to read serial number (serial-api-visible disabled?)."));
     if (! chalresp_path)
@@ -211,14 +211,14 @@ get_user_challenge_file(YK_KEY *yk, const char *chalresp_path, const char *usern
   } else {
     /* We have serial number */
     int res = asprintf (&filename, "%s-%i", chalresp_path == NULL ? "challenge" : username, serial);
-    
+
     if (res < 1)
       filename = NULL;
   }
-  
+
   if (filename == NULL)
     return 0;
-  
+
   return get_user_cfgfile_path (chalresp_path, filename, username, fn);
 }
 
diff --git a/ykpamcfg.c b/ykpamcfg.c
index ae894d7..ab0b1f0 100644
--- a/ykpamcfg.c
+++ b/ykpamcfg.c
@@ -52,7 +52,7 @@ const char *usage =
   "\n"
   "\t-1           Send challenge to slot 1. This is the default.\n"
   "\t-2           Send challenge to slot 2.\n"
-  "\t-A action    What to do.\n"	
+  "\t-A action    What to do.\n"
   "\n"
   "\t-v           verbose\n"
   "\t-h           help (this text)\n"
@@ -111,7 +111,7 @@ parse_args(int argc, char **argv,
     return 0;
     }
   }
-  
+
   return 1;
 }