diff --git a/ArmVirtPkg/ArmVirtKvmTool.dsc b/ArmVirtPkg/ArmVirtKvmTool.dsc
index 2ba00bd08f..d0afe1b49e 100644
--- a/ArmVirtPkg/ArmVirtKvmTool.dsc
+++ b/ArmVirtPkg/ArmVirtKvmTool.dsc
@@ -296,7 +296,11 @@
       NULL|ArmVirtPkg/Library/ArmVirtTimerFdtClientLib/ArmVirtTimerFdtClientLib.inf
   }
 
-  OvmfPkg/VirtNorFlashDxe/VirtNorFlashDxe.inf
+  OvmfPkg/VirtNorFlashDxe/VirtNorFlashDxe.inf {
+    <LibraryClasses>
+      # don't use unaligned CopyMem () on the UEFI varstore NOR flash region
+      BaseMemoryLib|MdePkg/Library/BaseMemoryLib/BaseMemoryLib.inf
+  }
 
   MdeModulePkg/Universal/WatchdogTimerDxe/WatchdogTimer.inf
 
diff --git a/ArmVirtPkg/ArmVirtQemu.dsc b/ArmVirtPkg/ArmVirtQemu.dsc
index 5dd8b6104c..0f1c639548 100644
--- a/ArmVirtPkg/ArmVirtQemu.dsc
+++ b/ArmVirtPkg/ArmVirtQemu.dsc
@@ -428,7 +428,11 @@
     <LibraryClasses>
       NULL|ArmVirtPkg/Library/ArmVirtTimerFdtClientLib/ArmVirtTimerFdtClientLib.inf
   }
-  OvmfPkg/VirtNorFlashDxe/VirtNorFlashDxe.inf
+  OvmfPkg/VirtNorFlashDxe/VirtNorFlashDxe.inf {
+    <LibraryClasses>
+      # don't use unaligned CopyMem () on the UEFI varstore NOR flash region
+      BaseMemoryLib|MdePkg/Library/BaseMemoryLib/BaseMemoryLib.inf
+  }
   MdeModulePkg/Universal/WatchdogTimerDxe/WatchdogTimer.inf
 
   #
diff --git a/ArmVirtPkg/ArmVirtQemuKernel.dsc b/ArmVirtPkg/ArmVirtQemuKernel.dsc
index f5db3ac432..807c85d482 100644
--- a/ArmVirtPkg/ArmVirtQemuKernel.dsc
+++ b/ArmVirtPkg/ArmVirtQemuKernel.dsc
@@ -331,7 +331,11 @@
     <LibraryClasses>
       NULL|ArmVirtPkg/Library/ArmVirtTimerFdtClientLib/ArmVirtTimerFdtClientLib.inf
   }
-  OvmfPkg/VirtNorFlashDxe/VirtNorFlashDxe.inf
+  OvmfPkg/VirtNorFlashDxe/VirtNorFlashDxe.inf {
+    <LibraryClasses>
+      # don't use unaligned CopyMem () on the UEFI varstore NOR flash region
+      BaseMemoryLib|MdePkg/Library/BaseMemoryLib/BaseMemoryLib.inf
+  }
   MdeModulePkg/Universal/WatchdogTimerDxe/WatchdogTimer.inf
 
   #