diff --git a/tracer/src/Datadog.Trace/Iast/DefaultTaintedMap.cs b/tracer/src/Datadog.Trace/Iast/DefaultTaintedMap.cs
index 7c75ec2866e0..dc6608ee8cd9 100644
--- a/tracer/src/Datadog.Trace/Iast/DefaultTaintedMap.cs
+++ b/tracer/src/Datadog.Trace/Iast/DefaultTaintedMap.cs
@@ -228,7 +228,7 @@ public void Clear()
 
     private int IndexObject(object objectStored)
     {
-        return Index(PositiveHashCode(objectStored.GetHashCode()));
+        return Index(PositiveHashCode(IastUtils.IdentityHashCode(objectStored)));
     }
 
     private int PositiveHashCode(int hash)
diff --git a/tracer/src/Datadog.Trace/Iast/IastUtils.cs b/tracer/src/Datadog.Trace/Iast/IastUtils.cs
index 91e1dc4bb19e..9567371ae8eb 100644
--- a/tracer/src/Datadog.Trace/Iast/IastUtils.cs
+++ b/tracer/src/Datadog.Trace/Iast/IastUtils.cs
@@ -71,7 +71,20 @@ private static int GetHash<T>(T element)
 
     public static int IdentityHashCode(object item)
     {
-        return (item?.GetHashCode() ?? 0);
+        if (item == null)
+        {
+            return 0;
+        }
+
+        try
+        {
+            return item.GetHashCode();
+        }
+        catch
+        {
+            // Seen this that it appears some customer objects have overrode GetHashCode and throw
+            return System.Runtime.CompilerServices.RuntimeHelpers.GetHashCode(item);
+        }
     }
 
     public static Range[] GetRangesForString(string stringValue, Source source)