diff --git a/de4dot.blocks/StackTracePatcher.cs b/de4dot.blocks/StackTracePatcher.cs
index a5acce88..1d4334f7 100644
--- a/de4dot.blocks/StackTracePatcher.cs
+++ b/de4dot.blocks/StackTracePatcher.cs
@@ -79,7 +79,6 @@ namespace de4dot.blocks {
 		}
 
 		public static StackTrace WriteStackFrame(StackTrace stackTrace, int frameNo, MethodBase newMethod) {
-			var framesField = GetStackTraceStackFramesField();
 			var frames = (StackFrame[])framesField.GetValue(stackTrace);
 			int numFramesToSkip = (int)methodsToSkipField.GetValue(stackTrace);
 			WriteMethodBase(frames[numFramesToSkip + frameNo], newMethod);