diff --git a/Makefile b/Makefile
index 46b482e0a5b..cdd1f324a57 100644
--- a/Makefile
+++ b/Makefile
@@ -31,7 +31,7 @@ ifeq ($(LEDGER_ENABLED),true)
     ifeq ($(GCCEXE),)
       $(error gcc.exe not installed for ledger support, please install or set LEDGER_ENABLED=false)
     else
-      build_tags += ledger
+      build_tags = $(build_tags) ledger
     endif
   else
     UNAME_S = $(shell uname -s)