diff --git a/makefiles/boot/riotboot.mk b/makefiles/boot/riotboot.mk
index 7293fcb0d5..7db04d4b52 100644
--- a/makefiles/boot/riotboot.mk
+++ b/makefiles/boot/riotboot.mk
@@ -117,9 +117,12 @@ riotboot/flash-extended-slot0: HEXFILE=$(RIOTBOOT_EXTENDED_BIN)
 # Flashing rule for openocd to flash combined/extended binaries
 riotboot/flash-combined-slot0: ELFFILE=$(RIOTBOOT_COMBINED_BIN)
 riotboot/flash-extended-slot0: ELFFILE=$(RIOTBOOT_EXTENDED_BIN)
+
+riotboot/flash-combined-slot0: FLASHFILE=$(RIOTBOOT_COMBINED_BIN)
 riotboot/flash-combined-slot0: $(RIOTBOOT_COMBINED_BIN) $(FLASHDEPS)
 	$(FLASHER) $(FFLAGS)
 
+riotboot/flash-extended-slot0: FLASHFILE=$(RIOTBOOT_EXTENDED_BIN)
 riotboot/flash-extended-slot0: $(RIOTBOOT_EXTENDED_BIN) $(FLASHDEPS)
 	$(FLASHER) $(FFLAGS)
 
@@ -129,6 +132,7 @@ riotboot/flash-slot0: export IMAGE_OFFSET=$(SLOT0_OFFSET)
 riotboot/flash-slot0: HEXFILE=$(SLOT0_RIOT_BIN)
 # openocd
 riotboot/flash-slot0: ELFFILE=$(SLOT0_RIOT_BIN)
+riotboot/flash-slot0: FLASHFILE=$(SLOT0_RIOT_BIN)
 riotboot/flash-slot0: $(SLOT0_RIOT_BIN) $(FLASHDEPS)
 	$(FLASHER) $(FFLAGS)
 
@@ -138,6 +142,7 @@ riotboot/flash-slot1: export IMAGE_OFFSET=$(SLOT1_OFFSET)
 riotboot/flash-slot1: HEXFILE=$(SLOT1_RIOT_BIN)
 # openocd
 riotboot/flash-slot1: ELFFILE=$(SLOT1_RIOT_BIN)
+riotboot/flash-slot1: FLASHFILE=$(SLOT1_RIOT_BIN)
 riotboot/flash-slot1: $(SLOT1_RIOT_BIN) $(FLASHDEPS)
 	$(FLASHER) $(FFLAGS)