diff --git a/SecurityPkg/Application/RngTest/RngTest.inf b/SecurityPkg/Application/RngTest/RngTest.inf
index 334cff45b0..55510f709a 100644
--- a/SecurityPkg/Application/RngTest/RngTest.inf
+++ b/SecurityPkg/Application/RngTest/RngTest.inf
@@ -27,7 +27,7 @@
 #
 # The following information is for reference only and not required by the build tools.
 #
-#  VALID_ARCHITECTURES           = IA32 X64
+#  VALID_ARCHITECTURES           = IA32 X64 ARM AARCH64
 #
 
 [Sources]
diff --git a/SecurityPkg/SecurityPkg.dsc b/SecurityPkg/SecurityPkg.dsc
index 8b9240374c..bb7147ec75 100644
--- a/SecurityPkg/SecurityPkg.dsc
+++ b/SecurityPkg/SecurityPkg.dsc
@@ -19,7 +19,7 @@
   PLATFORM_VERSION               = 0.97
   DSC_SPECIFICATION              = 0x00010005
   OUTPUT_DIRECTORY               = Build/SecurityPkg
-  SUPPORTED_ARCHITECTURES        = IA32|IPF|X64|EBC
+  SUPPORTED_ARCHITECTURES        = IA32|IPF|X64|EBC|ARM|AARCH64
   BUILD_TARGETS                  = DEBUG|RELEASE|NOOPT
   SKUID_IDENTIFIER               = DEFAULT