diff --git a/mpy-cross/Makefile b/mpy-cross/Makefile
index 971f2f81a..c6a7f5c9e 100644
--- a/mpy-cross/Makefile
+++ b/mpy-cross/Makefile
@@ -19,6 +19,7 @@ INC += -I$(TOP)
 # compiler settings
 CWARN = -Wall -Werror
 CWARN += -Wextra -Wno-unused-parameter -Wpointer-arith
+CWARN += -Wno-error=dangling-pointer -Wno-error=enum-int-mismatch
 CFLAGS = $(INC) $(CWARN) -std=gnu99 $(CFLAGS_MOD) $(COPT) $(CFLAGS_EXTRA)
 CFLAGS += -fdata-sections -ffunction-sections -fno-asynchronous-unwind-tables
 
diff --git a/ports/stm32/Makefile b/ports/stm32/Makefile
index 88faf70ba..ce3421a4c 100644
--- a/ports/stm32/Makefile
+++ b/ports/stm32/Makefile
@@ -96,6 +96,7 @@ CFLAGS_MCU_h7 = $(CFLAGS_CORTEX_M) -mtune=cortex-m7 -mcpu=cortex-m7
 CFLAGS_MCU_wb = $(CFLAGS_CORTEX_M) -mtune=cortex-m4 -mcpu=cortex-m4
 
 CFLAGS += $(INC) -Wall -Wpointer-arith -Werror -Wdouble-promotion -Wfloat-conversion -std=gnu99 -nostdlib $(CFLAGS_MOD) $(CFLAGS_EXTRA)
+CFLAGS += -Wno-error=dangling-pointer
 CFLAGS += -D$(CMSIS_MCU)
 CFLAGS += $(CFLAGS_MCU_$(MCU_SERIES))
 CFLAGS += $(COPT)
diff --git a/ports/unix/Makefile b/ports/unix/Makefile
index 6a936a242..ae68fe11b 100644
--- a/ports/unix/Makefile
+++ b/ports/unix/Makefile
@@ -40,6 +40,7 @@ INC += -I$(BUILD)
 # compiler settings
 CWARN = -Wall -Werror
 CWARN += -Wextra -Wno-unused-parameter -Wpointer-arith -Wdouble-promotion -Wfloat-conversion
+CWARN += -Wno-error=enum-int-mismatch
 CFLAGS += $(INC) $(CWARN) -std=gnu99 -DUNIX $(CFLAGS_MOD) $(COPT) -I$(VARIANT_DIR) $(CFLAGS_EXTRA)
 
 # Debugging/Optimization