diff --git a/SourceCode/Code2026/CoreLibrary/AecDbCamera.cpp b/SourceCode/Code2026/CoreLibrary/AecDbCamera.cpp
index db3b87d..8b5667e 100644
--- a/SourceCode/Code2026/CoreLibrary/AecDbCamera.cpp
+++ b/SourceCode/Code2026/CoreLibrary/AecDbCamera.cpp
@@ -511,7 +511,7 @@ namespace
 		{
 			LineStair data;
 			memset(&data,0,sizeof(LineStair));
-			pArcStair->GetLineStairData(data);
+			pLineStair->GetLineStairData(data);
 			dDiameter = data.bar.dD;
 			return true;
 		}