diff --git a/boards/hamilton/Makefile.include b/boards/hamilton/Makefile.include
index b878fff703..b0e0a9ebce 100644
--- a/boards/hamilton/Makefile.include
+++ b/boards/hamilton/Makefile.include
@@ -5,7 +5,7 @@ export CPU_MODEL = samr21e18a
 # debugger config
 export JLINK_DEVICE := atsamr21e18a
 export OBJDUMPFLAGS += --disassemble --source --disassembler-options=force-thumb
-export OFLAGS := -O binary --gap-fill 0xff
+export OFLAGS := --gap-fill 0xff
 
 # Configure terminal, hamilton doesn't provide any UART, thus use RTT
 TERMPROG = $(RIOTTOOLS)/jlink/jlink.sh