diff --git a/ArmPlatformPkg/ArmJunoPkg/Library/ArmJunoLib/ArmJuno.c b/ArmPlatformPkg/ArmJunoPkg/Library/ArmJunoLib/ArmJuno.c
index 3be26d3ed0..ffff562824 100644
--- a/ArmPlatformPkg/ArmJunoPkg/Library/ArmJunoLib/ArmJuno.c
+++ b/ArmPlatformPkg/ArmJunoPkg/Library/ArmJunoLib/ArmJuno.c
@@ -140,14 +140,12 @@ PrePeiCoreGetMpCoreInfo (
   return EFI_SUCCESS;
 }
 
-// Needs to be declared in the file. Otherwise gArmMpCoreInfoPpiGuid is undefined in the contect of PrePeiCore
-EFI_GUID mArmMpCoreInfoPpiGuid = ARM_MP_CORE_INFO_PPI_GUID;
 ARM_MP_CORE_INFO_PPI mMpCoreInfoPpi = { PrePeiCoreGetMpCoreInfo };
 
 EFI_PEI_PPI_DESCRIPTOR      gPlatformPpiTable[] = {
   {
     EFI_PEI_PPI_DESCRIPTOR_PPI,
-    &mArmMpCoreInfoPpiGuid,
+    &gArmMpCoreInfoPpiGuid,
     &mMpCoreInfoPpi
   }
 };
diff --git a/ArmPlatformPkg/ArmJunoPkg/Library/ArmJunoLib/ArmJunoLib.inf b/ArmPlatformPkg/ArmJunoPkg/Library/ArmJunoLib/ArmJunoLib.inf
index 092b606b24..530bb1cb9d 100644
--- a/ArmPlatformPkg/ArmJunoPkg/Library/ArmJunoLib/ArmJunoLib.inf
+++ b/ArmPlatformPkg/ArmJunoPkg/Library/ArmJunoLib/ArmJunoLib.inf
@@ -62,3 +62,6 @@
   gArmPlatformTokenSpaceGuid.PcdPciMmio32Size
   gArmPlatformTokenSpaceGuid.PcdPciMmio64Base
   gArmPlatformTokenSpaceGuid.PcdPciMmio64Size
+
+[Ppis]
+  gArmMpCoreInfoPpiGuid