diff --git a/src/dev/amdgpu/amdgpu_device.cc b/src/dev/amdgpu/amdgpu_device.cc
index 227e69e..2b58b20 100644
--- a/src/dev/amdgpu/amdgpu_device.cc
+++ b/src/dev/amdgpu/amdgpu_device.cc
@@ -270,7 +270,7 @@
 
     // Record the value
     if (aperture == gpuvm.gartBase()) {
-        gpuvm.gartTable[aperture_offset] = pkt->getLE<uint32_t>();
+        gpuvm.gartTable[aperture_offset] = pkt->getUintX(ByteOrder::little);
         DPRINTF(AMDGPUDevice, "GART translation %p -> %p\n", aperture_offset,
                 gpuvm.gartTable[aperture_offset]);
     }
diff --git a/src/dev/amdgpu/amdgpu_vm.hh b/src/dev/amdgpu/amdgpu_vm.hh
index 8df169b..212a688 100644
--- a/src/dev/amdgpu/amdgpu_vm.hh
+++ b/src/dev/amdgpu/amdgpu_vm.hh
@@ -165,7 +165,7 @@
      * Copy of GART table. Typically resides in device memory, however we use
      * a copy in gem5 to simplify the interface.
      */
-    std::unordered_map<uint64_t, uint32_t> gartTable;
+    std::unordered_map<uint64_t, uint64_t> gartTable;
 
     void readMMIO(PacketPtr pkt, Addr offset);
     void writeMMIO(PacketPtr pkt, Addr offset);