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-rw-r--r--Makefile.am3
1 files changed, 2 insertions, 1 deletions
diff --git a/Makefile.am b/Makefile.am
index 51c6d33af0..a5e07cfa68 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -2533,7 +2533,8 @@ if ARCH_X86_64
efi_cflags += \
-mno-red-zone \
-DEFI_FUNCTION_WRAPPER \
- -DGNU_EFI_USE_MS_ABI
+ -DGNU_EFI_USE_MS_ABI \
+ -std=gnu90
endif
efi_ldflags = \