diff --git a/driver/opae/vlsim/Makefile b/driver/opae/vlsim/Makefile
index 07ded2d0..ac38faca 100644
--- a/driver/opae/vlsim/Makefile
+++ b/driver/opae/vlsim/Makefile
@@ -77,7 +77,7 @@ VL_FLAGS += -DNOPAE
 CFLAGS += -DNOPAE
 
 # use DPI FPU
-VL_FLAGS += -DFPU_FAST
+#VL_FLAGS += -DFPU_FAST
 
 RTL_INCLUDE += -I../../../hw/opae  -I../../../hw/opae/ccip
 
diff --git a/driver/tests/dogfood/Makefile b/driver/tests/dogfood/Makefile
index 46cb364a..69a5ec80 100644
--- a/driver/tests/dogfood/Makefile
+++ b/driver/tests/dogfood/Makefile
@@ -1,7 +1,7 @@
 RISCV_TOOLCHAIN_PATH ?= /opt/riscv-gnu-toolchain
 VORTEX_RT_PATH ?= $(wildcard ../../../runtime)
 
-OPTS ?= -n64
+OPTS ?= -n32
 
 VX_CC  = $(RISCV_TOOLCHAIN_PATH)/bin/riscv32-unknown-elf-gcc
 VX_CXX = $(RISCV_TOOLCHAIN_PATH)/bin/riscv32-unknown-elf-g++