diff --git a/projects/clr/rocclr/runtime/device/pal/palprogram.cpp b/projects/clr/rocclr/runtime/device/pal/palprogram.cpp
index 4e9ed615a5..7193825b1d 100644
--- a/projects/clr/rocclr/runtime/device/pal/palprogram.cpp
+++ b/projects/clr/rocclr/runtime/device/pal/palprogram.cpp
@@ -120,8 +120,9 @@ Segment::freeze(bool destroySysmem)
     VirtualGPU& gpu = *gpuAccess_->dev().xferQueue();
     bool result = true;
     if (cpuAccess_ != nullptr) {
+        assert(gpuAccess_->size() == cpuAccess_->size() && "Backing store size mismatch!");
         result = cpuAccess_->partialMemCopyTo(gpu,
-            0, 0, gpuAccess_->vmSize(), *gpuAccess_, false, true);
+            0, 0, gpuAccess_->size(), *gpuAccess_, false, true);
         gpu.releaseMemObjects();
         gpu.waitAllEngines();
     }