diff --git a/src/device/usbd.c b/src/device/usbd.c
index f11696e78..e5ff52542 100644
--- a/src/device/usbd.c
+++ b/src/device/usbd.c
@@ -764,7 +764,7 @@ static bool process_set_config(uint8_t rhport, uint8_t cfg_num)
         if (desc_itf_assoc)
         {
           // IAD's first interface number and class/subclass/protocol should match with opened interface
-          TU_ASSERT(desc_itf_assoc->bFirstInterface == desc_itf->bInterfaceNumber   &&
+          TU_ASSERT(desc_itf_assoc->bFirstInterface == desc_itf->bInterfaceNumber &&
                     desc_itf_assoc->bFunctionClass  == desc_itf->bInterfaceClass);
 
           for(uint8_t i=1; i<desc_itf_assoc->bInterfaceCount; i++)