diff --git a/boot/espressif/tools/toolchain-esp32c3.cmake b/boot/espressif/tools/toolchain-esp32c3.cmake
index cd30a2a..5493620 100644
--- a/boot/espressif/tools/toolchain-esp32c3.cmake
+++ b/boot/espressif/tools/toolchain-esp32c3.cmake
@@ -4,6 +4,6 @@
 set(CMAKE_CXX_COMPILER riscv32-esp-elf-g++)
 set(CMAKE_ASM_COMPILER riscv32-esp-elf-gcc)
 
-set(CMAKE_C_FLAGS "-march=rv32imc" CACHE STRING "C Compiler Base Flags")
-set(CMAKE_CXX_FLAGS "-march=rv32imc" CACHE STRING "C++ Compiler Base Flags")
-set(CMAKE_EXE_LINKER_FLAGS "-nostartfiles -march=rv32imc --specs=nosys.specs" CACHE STRING "Linker Base Flags")
+set(CMAKE_C_FLAGS "-march=rv32imc_zicsr_zifencei" CACHE STRING "C Compiler Base Flags")
+set(CMAKE_CXX_FLAGS "-march=rv32imc_zicsr_zifencei" CACHE STRING "C++ Compiler Base Flags")
+set(CMAKE_EXE_LINKER_FLAGS "-nostartfiles -march=rv32imc_zicsr_zifencei --specs=nosys.specs" CACHE STRING "Linker Base Flags")