diff --git a/ports/stm32/Makefile b/ports/stm32/Makefile
index abca3a05f8..66c2171658 100644
--- a/ports/stm32/Makefile
+++ b/ports/stm32/Makefile
@@ -169,7 +169,7 @@ ifeq ($(LTO),1)
 CFLAGS += -flto=auto
 # LTO requires passing compiler flags to the linker as it will run the assembler.
 # To avoid risk of missing something relevant, pass all flags except for preprocessor args
-LDFLAGS += $(filter-out -I%,$(filter-out -D%,$(CFLAGS)))
+LDFLAGS += $(filter-out -fplugin%, $(filter-out -I%,$(filter-out -D%,$(CFLAGS))))
 
 $(BUILD)/stm32_it.o $(BUILD)/pendsv.o: CFLAGS += -fno-lto
 endif