diff --git a/makefiles/suit.inc.mk b/makefiles/suit.inc.mk
index 3c9b5f0c6e..b06e0b9fbd 100644
--- a/makefiles/suit.inc.mk
+++ b/makefiles/suit.inc.mk
@@ -34,6 +34,7 @@ SUIT_NOTIFY_MANIFEST ?= $(SUIT_MANIFEST_BASENAME).$(SUIT_NOTIFY_VERSION).bin
 
 # Long manifest names require more buffer space when parsing
 export CFLAGS += -DCONFIG_SOCK_URLPATH_MAXLEN=128
+export CFLAGS += -DSUIT_VENDOR_DOMAIN="\"$(SUIT_VENDOR)\""
 
 SUIT_MANIFEST_PAYLOADS ?= $(SLOT0_RIOT_BIN) $(SLOT1_RIOT_BIN)
 SUIT_MANIFEST_SLOTFILES ?= $(SLOT0_RIOT_BIN):$(SLOT0_OFFSET) \