diff --git a/Gems/Atom/Feature/Common/Code/Source/Decals/DecalTextureArrayFeatureProcessor.cpp b/Gems/Atom/Feature/Common/Code/Source/Decals/DecalTextureArrayFeatureProcessor.cpp
index 24857f8d65..e4bb379c6a 100644
--- a/Gems/Atom/Feature/Common/Code/Source/Decals/DecalTextureArrayFeatureProcessor.cpp
+++ b/Gems/Atom/Feature/Common/Code/Source/Decals/DecalTextureArrayFeatureProcessor.cpp
@@ -134,7 +134,10 @@ namespace AZ
             {
                 m_decalData.GetData(decal.GetIndex()) = m_decalData.GetData(sourceDecal.GetIndex());
                 const auto materialAsset = GetMaterialUsedByDecal(sourceDecal);
-                m_materialToTextureArrayLookupTable.at(materialAsset).m_useCount++;
+                if (materialAsset.IsValid())
+                {
+                    m_materialToTextureArrayLookupTable.at(materialAsset).m_useCount++;
+                }
                 m_deviceBufferNeedsUpdate = true;
             }
             return decal;