diff --git a/BaseTools/Conf/tools_def.template b/BaseTools/Conf/tools_def.template
index 7d4fd167c2..f3d30205bb 100755
--- a/BaseTools/Conf/tools_def.template
+++ b/BaseTools/Conf/tools_def.template
@@ -380,7 +380,8 @@ DEFINE SOURCERY_CYGWIN_TOOLS = /cygdrive/c/Program Files/CodeSourcery/Sourcery G
 #                               Intel(r) ACPI Compiler from
 #                               https://acpica.org/downloads
 #   CLANG38  -Linux-  Requires:
-#                             Clang v3.8 or later, LLVMgold plugin and GNU binutils 2.26 targeting x86_64-linux-gnu
+#                             Clang v3.8, LLVMgold plugin and GNU binutils 2.26 targeting x86_64-linux-gnu
+#                             Clang v3.9 or later, LLVMgold plugin and GNU binutils 2.28 targeting x86_64-linux-gnu
 #                        Optional:
 #                             Required to build platforms or ACPI tables:
 #                               Intel(r) ACPI Compiler from
@@ -5516,7 +5517,7 @@ DEFINE CLANG38_X64_PREFIX           = ENV(CLANG38_BIN)
 DEFINE CLANG38_IA32_TARGET          = -target i686-pc-linux-gnu
 DEFINE CLANG38_X64_TARGET           = -target x86_64-pc-linux-gnu
 
-DEFINE CLANG38_ALL_CC_FLAGS         = DEF(GCC44_ALL_CC_FLAGS) -Wno-empty-body -fno-stack-protector -mms-bitfields -Wno-address -Wno-shift-negative-value -Wno-parentheses-equality -Wno-unknown-pragmas -Wno-tautological-constant-out-of-range-compare -Wno-incompatible-library-redeclaration -fno-asynchronous-unwind-tables -mno-sse -mno-mmx -msoft-float -mno-implicit-float  -ftrap-function=undefined_behavior_has_been_optimized_away_by_clang -funsigned-char -fno-ms-extensions -Wno-null-dereference -Wno-tautological-compare -Wno-unknown-warning-option
+DEFINE CLANG38_ALL_CC_FLAGS         = DEF(GCC44_ALL_CC_FLAGS) -Wno-empty-body -fno-stack-protector -mms-bitfields -Wno-address -Wno-shift-negative-value -Wno-parentheses-equality -Wno-unknown-pragmas -Wno-tautological-constant-out-of-range-compare -Wno-incompatible-library-redeclaration -fno-asynchronous-unwind-tables -mno-sse -mno-mmx -msoft-float -mno-implicit-float  -ftrap-function=undefined_behavior_has_been_optimized_away_by_clang -funsigned-char -fno-ms-extensions -Wno-null-dereference -Wno-tautological-compare -Wno-unknown-warning-option -Wno-varargs
 
 ###########################
 # CLANG38 IA32 definitions