diff --git a/boards/risc-v/k210/maix-bit/scripts/Make.defs b/boards/risc-v/k210/maix-bit/scripts/Make.defs
index 68b536b7441..5935e976964 100644
--- a/boards/risc-v/k210/maix-bit/scripts/Make.defs
+++ b/boards/risc-v/k210/maix-bit/scripts/Make.defs
@@ -41,7 +41,7 @@ ifneq ($(CONFIG_DEBUG_NOOPT),y)
   ARCHOPTIMIZATION += $(MAXOPTIMIZATION) -fno-strict-aliasing -fno-strength-reduce -fomit-frame-pointer
 endif
 
-ARCHCPUFLAGS = -march=rv64gc -mabi=lp64 -mcmodel=medany
+ARCHCPUFLAGS = -march=rv64imafc -mabi=lp64f -mcmodel=medany
 ARCHCFLAGS = -fno-builtin -ffunction-sections -fdata-sections
 ARCHCXXFLAGS = -fno-builtin -fno-exceptions -fcheck-new -fno-rtti
 ARCHWARNINGS = -Wall -Wstrict-prototypes -Wshadow -Wundef