diff --git a/src/coreclr/jit/fgprofile.cpp b/src/coreclr/jit/fgprofile.cpp
index ef614baca4815f..33f922344cffcd 100644
--- a/src/coreclr/jit/fgprofile.cpp
+++ b/src/coreclr/jit/fgprofile.cpp
@@ -3297,6 +3297,15 @@ void EfficientEdgeCountReconstructor::Prepare()
 //
 void EfficientEdgeCountReconstructor::Solve()
 {
+    // If we have dynamic PGO data, we don't expect to see any mismatches,
+    // since the schema we got from the runtime should have come from the
+    // exact same JIT and IL, created in an earlier tier.
+    //
+    if (m_comp->fgPgoSource == ICorJitInfo::PgoSource::Dynamic)
+    {
+        assert(!m_mismatch);
+    }
+
     // If issues arose earlier, then don't try solving.
     //
     if (m_badcode || m_mismatch || m_allWeightsZero)