diff --git a/makefiles/mcuboot.mk b/makefiles/mcuboot.mk
index b090bb4e27..107f368c45 100644
--- a/makefiles/mcuboot.mk
+++ b/makefiles/mcuboot.mk
@@ -1,6 +1,6 @@
 ifdef MCUBOOT_SLOT0_SIZE
 
-IMGTOOL ?= $(RIOTBASE)/dist/tools/mcuboot/imgtool.py
+IMGTOOL ?= $(RIOTTOOLS)/mcuboot/imgtool.py
 override IMGTOOL := $(abspath $(IMGTOOL))
 
 BINFILE ?= $(BINDIR)/$(APPLICATION).bin