diff --git a/driver/rtlsim/Makefile b/driver/rtlsim/Makefile
index 3f2b22ae..5bfe5553 100644
--- a/driver/rtlsim/Makefile
+++ b/driver/rtlsim/Makefile
@@ -43,10 +43,11 @@ SRCS += $(DPI_DIR)/util_dpi.cpp $(DPI_DIR)/float_dpi.cpp
 FPU_INCLUDE = -I$(RTL_DIR)/fp_cores -I$(DPI_DIR) -I$(RTL_DIR)/fp_cores/fpnew/src/common_cells/include -I$(RTL_DIR)/fp_cores/fpnew/src/common_cells/src -I$(RTL_DIR)/fp_cores/fpnew/src/fpu_div_sqrt_mvp/hdl -I$(RTL_DIR)/fp_cores/fpnew/src 
 RTL_INCLUDE = -I$(RTL_DIR) -I$(RTL_DIR)/libs -I$(RTL_DIR)/interfaces -I$(RTL_DIR)/cache $(FPU_INCLUDE)
 
-VL_FLAGS += -O2 --language 1800-2009 --assert -Wall -Wpedantic $(CONFIGS)
+VL_FLAGS += -O2 --language 1800-2009 --assert -Wall -Wpedantic
 VL_FLAGS += -Wno-DECLFILENAME -Wno-REDEFMACRO
 VL_FLAGS += --x-initial unique --x-assign unique
 VL_FLAGS += verilator.vlt
+VL_FLAGS += $(CONFIGS)
 
 # Enable Verilator multithreaded simulation
 #THREADS ?= $(shell python3 -c 'import multiprocessing as mp; print(max(1, mp.cpu_count() // 2))')