diff --git a/ArmPlatformPkg/ArmRealViewEbPkg/ArmRealViewEb-RTSM-A8.dsc b/ArmPlatformPkg/ArmRealViewEbPkg/ArmRealViewEb-RTSM-A8.dsc
index f7852b9be8..f8d360f75d 100644
--- a/ArmPlatformPkg/ArmRealViewEbPkg/ArmRealViewEb-RTSM-A8.dsc
+++ b/ArmPlatformPkg/ArmRealViewEbPkg/ArmRealViewEb-RTSM-A8.dsc
@@ -164,6 +164,7 @@
       ArmGicSecLib|ArmPkg/Drivers/PL390Gic/PL390GicLib.inf
       ArmLib|ArmPkg/Library/ArmLib/ArmV7/ArmV7Lib.inf
       ArmPlatformLib|ArmPlatformPkg/ArmRealViewEbPkg/Library/ArmRealViewEbLibRTSM/ArmRealViewEbLib.inf
+      ArmPlatformGlobalVariableLib|ArmPlatformPkg/Library/ArmPlatformGlobalVariableLib/PrePi/PrePiArmPlatformGlobalVariableLib.inf
   }
 !else
   ArmPlatformPkg/PrePeiCore/PrePeiCoreUniCore.inf {
diff --git a/ArmPlatformPkg/ArmRealViewEbPkg/ArmRealViewEb-RTSM-A9x2.dsc b/ArmPlatformPkg/ArmRealViewEbPkg/ArmRealViewEb-RTSM-A9x2.dsc
index 235740e49f..822b0848f1 100644
--- a/ArmPlatformPkg/ArmRealViewEbPkg/ArmRealViewEb-RTSM-A9x2.dsc
+++ b/ArmPlatformPkg/ArmRealViewEbPkg/ArmRealViewEb-RTSM-A9x2.dsc
@@ -160,6 +160,7 @@
       ArmGicSecLib|ArmPkg/Drivers/PL390Gic/PL390GicLib.inf
       ArmLib|ArmPkg/Library/ArmLib/ArmV7/ArmV7Lib.inf
       ArmPlatformLib|ArmPlatformPkg/ArmRealViewEbPkg/Library/ArmRealViewEbLibRTSM/ArmRealViewEbLib.inf
+      ArmPlatformGlobalVariableLib|ArmPlatformPkg/Library/ArmPlatformGlobalVariableLib/PrePi/PrePiArmPlatformGlobalVariableLib.inf
   }
 !else
   ArmPlatformPkg/PrePeiCore/PrePeiCoreMPCore.inf {