diff --git a/mk/LinuxKM.mk b/mk/LinuxKM.mk
index c7fd768..2b9f057 100644
--- a/mk/LinuxKM.mk
+++ b/mk/LinuxKM.mk
@@ -1,7 +1,11 @@
 # Set the path to the Kernel build utils.
 KBUILD=/lib/modules/$(shell uname -r)/build/
 
-ccflags-y += -Ofast -ffreestanding
+ccflags-y += -Ofast -ffreestanding -Wno-undef -Wno-error=frame-larger-than=
+CFLAGS_src/ssl/ssl_engine.o := -Wno-error=implicit-fallthrough=
+CFLAGS_src/int/i31_encode.o := -Wno-error=implicit-fallthrough=
+CFLAGS_src/int/i32_encode.o := -Wno-error=implicit-fallthrough=
+
 ARCH := $(shell uname -m)
 ifeq ($(ARCH), aarch64)
 	ccflags-remove-y += -mgeneral-regs-only
diff --git a/src/ec/ec_p256_m62.c b/src/ec/ec_p256_m62.c
index b8badf9..30fcce2 100644
--- a/src/ec/ec_p256_m62.c
+++ b/src/ec/ec_p256_m62.c
@@ -81,7 +81,9 @@ api_xoff(int curve, size_t *len)
  * In particular, such a value is less than twice the modulus p.
  */
 
+#ifndef BIT
 #define BIT(n)   ((uint64_t)1 << (n))
+#endif
 #define MASK48   (BIT(48) - BIT(0))
 #define MASK52   (BIT(52) - BIT(0))