diff --git a/tracer/src/Datadog.Trace/Iast/StackWalker.cs b/tracer/src/Datadog.Trace/Iast/StackWalker.cs
index ff81a686fdf8..e34e87275ab6 100644
--- a/tracer/src/Datadog.Trace/Iast/StackWalker.cs
+++ b/tracer/src/Datadog.Trace/Iast/StackWalker.cs
@@ -55,7 +55,8 @@ public static StackTrace GetStackTrace()
     public static bool TryGetFrame(StackTrace stackTrace, out StackFrame? targetFrame)
     {
         targetFrame = null;
-        foreach (var frame in stackTrace.GetFrames())
+        var frames = stackTrace.GetFrames() ?? [];
+        foreach (var frame in frames)
         {
             var declaringType = frame?.GetMethod()?.DeclaringType;