diff --git a/Makefile.port b/Makefile.port
index 21a7c4f87..a9fea91bd 100644
--- a/Makefile.port
+++ b/Makefile.port
@@ -134,7 +134,7 @@ ifeq ($(VERSION_BRANCH),HEAD)
   VERSION_BRANCH := port-custom
 endif
 
-BUILDID := $(ROMID)-port-$(TARGET_ARCH)
+BUILDID := $(ROMID)-$(TARGET_PLATFORM)
 
 DEFINES := \
   VERSION=$(VERSION) \