diff --git a/src/UsgsAstroLsSensorModel.cpp b/src/UsgsAstroLsSensorModel.cpp
index 48dd7dd73e2c361601d5ce2a99fbcb34cf621157..a25447ff885df67071300a23e785981306a6fbd0 100644
--- a/src/UsgsAstroLsSensorModel.cpp
+++ b/src/UsgsAstroLsSensorModel.cpp
@@ -527,6 +527,7 @@ void UsgsAstroLsSensorModel::reset() {
   m_detectorSampleSumming = 1.0;  // 15
   m_detectorLineSumming = 1.0;
   m_startingDetectorSample = 1.0;  // 16
+  m_startingDetectorLine   = 1.0;
   m_ikCode = -85600;               // 17
   m_focalLength = 350.0;           // 18
   m_zDirection = 1.0;              // 19