diff --git a/scripts/icestorm/Makefile b/scripts/icestorm/Makefile
index 2740da0..cd3b018 100644
--- a/scripts/icestorm/Makefile
+++ b/scripts/icestorm/Makefile
@@ -4,7 +4,7 @@ TOOLCHAIN_PREFIX = riscv32-unknown-elf-
 all: example.bin
 
 firmware.elf: firmware.S firmware.c firmware.lds
-	$(TOOLCHAIN_PREFIX)gcc -Os -m32 -ffreestanding -nostdlib -o firmware.elf firmware.S firmware.c \
+	$(TOOLCHAIN_PREFIX)gcc -Os -ffreestanding -nostdlib -o firmware.elf firmware.S firmware.c \
 			--std=gnu99 -Wl,-Bstatic,-T,firmware.lds,-Map,firmware.map,--strip-debug -lgcc
 	chmod -x firmware.elf
 
diff --git a/scripts/quartus/Makefile b/scripts/quartus/Makefile
index 8b994e0..c644609 100644
--- a/scripts/quartus/Makefile
+++ b/scripts/quartus/Makefile
@@ -37,7 +37,7 @@ sim_system: firmware.hex system_tb.v system.v ../../picorv32.v
 	./system_tb
 
 firmware.hex: firmware.S firmware.c firmware.lds
-	$(TOOLCHAIN_PREFIX)gcc -Os -m32 -ffreestanding -nostdlib -o firmware.elf firmware.S firmware.c \
+	$(TOOLCHAIN_PREFIX)gcc -Os -ffreestanding -nostdlib -o firmware.elf firmware.S firmware.c \
 		 --std=gnu99 -Wl,-Bstatic,-T,firmware.lds,-Map,firmware.map,--strip-debug -lgcc
 	$(TOOLCHAIN_PREFIX)objcopy -O binary firmware.elf firmware.bin
 	python3 ../../firmware/makehex.py firmware.bin 4096 > firmware.hex
diff --git a/scripts/vivado/Makefile b/scripts/vivado/Makefile
index b1a89b9..d825e16 100644
--- a/scripts/vivado/Makefile
+++ b/scripts/vivado/Makefile
@@ -41,7 +41,7 @@ sim_system:
 	$(XELAB) -L unifast_ver -L unisims_ver -R system_tb glbl
 
 firmware.hex: firmware.S firmware.c firmware.lds
-	$(TOOLCHAIN_PREFIX)gcc -Os -m32 -ffreestanding -nostdlib -o firmware.elf firmware.S firmware.c \
+	$(TOOLCHAIN_PREFIX)gcc -Os -ffreestanding -nostdlib -o firmware.elf firmware.S firmware.c \
 		 --std=gnu99 -Wl,-Bstatic,-T,firmware.lds,-Map,firmware.map,--strip-debug -lgcc
 	$(TOOLCHAIN_PREFIX)objcopy -O binary firmware.elf firmware.bin
 	python3 ../../firmware/makehex.py firmware.bin 4096 > firmware.hex