diff --git a/Pinpoint/include/AnalysisManager.hh b/Pinpoint/include/AnalysisManager.hh
index 27e8696..b054bed 100644
--- a/Pinpoint/include/AnalysisManager.hh
+++ b/Pinpoint/include/AnalysisManager.hh
@@ -177,7 +177,7 @@ class AnalysisManager {
     std::vector<UInt_t> fPixelRowIDs;
     std::vector<UInt_t> fPixelColIDs;
     std::vector<UInt_t> fPixelLayerIDs;
-    std::vector<UInt_t> fPixelPDGCs;
+    std::vector<Int_t> fPixelPDGCs;
     std::vector<UInt_t> fPixelTrackIDs;
     std::vector<UInt_t> fPixelParentIDs;
     std::vector<Float_t> fPixelPxs;
diff --git a/Pinpoint/src/AnalysisManager.cc b/Pinpoint/src/AnalysisManager.cc
index 59fff9a..b564339 100644
--- a/Pinpoint/src/AnalysisManager.cc
+++ b/Pinpoint/src/AnalysisManager.cc
@@ -165,7 +165,7 @@ void AnalysisManager::bookGeomTree()
   fGeom->Branch("pixel_Xpos", &pixelsXPos);
   fGeom->Branch("pixel_Ypos", &pixelsYPos);
   fGeom->Branch("pixel_Zpos", &pixelsZPos);
-  fGeom->Branch("sim_flag", &simFlag, "simFlag/F");
+  fGeom->Branch("sim_flag", &simFlag, "simFlag/I");
   fGeom->Branch("scint_bar_flag", &scintBarFlag, "scintBarFlag/F");
 }