diff --git a/BaseTools/Conf/tools_def.template b/BaseTools/Conf/tools_def.template
index 923517b5c296..8aeb8a2a6417 100755
--- a/BaseTools/Conf/tools_def.template
+++ b/BaseTools/Conf/tools_def.template
@@ -2037,6 +2037,7 @@ DEFINE GCC5_RISCV64_CC_FLAGS               = DEF(GCC5_RISCV_ALL_CC_FLAGS) DEF(GC
 DEFINE GCC5_RISCV64_DLINK_FLAGS            = DEF(GCC5_RISCV_ALL_DLINK_FLAGS) -Wl,-melf64lriscv,--oformat=elf64-littleriscv,--no-relax
 DEFINE GCC5_RISCV64_DLINK2_FLAGS           = DEF(GCC5_RISCV_ALL_DLINK2_FLAGS)
 DEFINE GCC5_RISCV64_ASM_FLAGS              = DEF(GCC5_RISCV_ALL_ASM_FLAGS) -march=DEF(GCC5_RISCV64_ARCH) -mcmodel=medany -mabi=lp64
+DEFINE GCC_PP_FLAGS                        = -E -x assembler-with-cpp -include AutoGen.h DEF(GCC5_RISCV_OPENSBI_TYPES)
 
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