diff --git a/canframemodel.cpp b/canframemodel.cpp
index fe54877..ef08b4f 100644
--- a/canframemodel.cpp
+++ b/canframemodel.cpp
@@ -34,8 +34,21 @@ int CANFrameModel::columnCount(const QModelIndex &index) const
 CANFrameModel::CANFrameModel(QObject *parent)
     : QAbstractTableModel(parent)
 {
-    frames.reserve(50000000); //yes, preallocating a huge number of frames.
-    filteredFrames.reserve(50000000); //the goal is to prevent a reallocation from ever happening
+
+    if (QSysInfo::WordSize > 32)
+    {
+        qDebug() << "64 bit OS detected. Requesting a large preallocation";
+        preallocSize = 50000000;
+    }
+    else //if compiling for 32 bit you can't ask for gigabytes of preallocation so tone it down.
+    {
+        qDebug() << "32 bit OS detected. Requesting a much restricted prealloc";
+        preallocSize = 5000000;
+    }
+
+    frames.reserve(preallocSize);
+    filteredFrames.reserve(preallocSize); //the goal is to prevent a reallocation from ever happening
+
     dbcHandler = NULL;
     interpretFrames = false;
     overwriteDups = false;
@@ -159,7 +172,7 @@ void CANFrameModel::recalcOverwrite()
     while (frames.count() > lastUnique) frames.removeLast();
 
     filteredFrames.clear();
-    filteredFrames.reserve(50000000);
+    filteredFrames.reserve(preallocSize);
 
     for (int i = 0; i < frames.count(); i++)
     {
@@ -360,7 +373,7 @@ void CANFrameModel::sendRefresh()
     beginResetModel();
     filteredFrames.clear();
     filteredFrames.append(tempContainer);
-    filteredFrames.reserve(50000000);
+    filteredFrames.reserve(preallocSize);
     lastUpdateNumFrames = filteredFrames.count();
     endResetModel();
     mutex.unlock();
@@ -416,8 +429,8 @@ void CANFrameModel::clearFrames()
     frames.clear();
     filteredFrames.clear();
     filters.clear();
-    frames.reserve(50000000);
-    filteredFrames.reserve(50000000);
+    frames.reserve(preallocSize);
+    filteredFrames.reserve(preallocSize);
     this->endResetModel();
     lastUpdateNumFrames = 0;
     mutex.unlock();
diff --git a/canframemodel.h b/canframemodel.h
index 7e93007..a994857 100644
--- a/canframemodel.h
+++ b/canframemodel.h
@@ -62,6 +62,7 @@ private:
     bool needFilterRefresh;
     uint64_t timeOffset;
     int lastUpdateNumFrames;
+    uint32_t preallocSize;
 };
 
 
diff --git a/deltamodel.cpp b/deltamodel.cpp
index 98f88fa..4d501d2 100644
--- a/deltamodel.cpp
+++ b/deltamodel.cpp
@@ -8,6 +8,7 @@ DeltaModel::DeltaModel(QObject *parent)
 QVariant DeltaModel::headerData(int section, Qt::Orientation orientation, int role) const
 {
     // FIXME: Implement me!
+    return QVariant();
 }
 
 int DeltaModel::rowCount(const QModelIndex &parent) const
@@ -15,6 +16,8 @@ int DeltaModel::rowCount(const QModelIndex &parent) const
     if (!parent.isValid())
         return 0;
 
+    return 0;
+
     // FIXME: Implement me!
 }
 
@@ -23,6 +26,8 @@ int DeltaModel::columnCount(const QModelIndex &parent) const
     if (!parent.isValid())
         return 0;
 
+    return 0;
+
     // FIXME: Implement me!
 }
 
diff --git a/graphingwindow.cpp b/graphingwindow.cpp
index 6aff9ec..e555f0f 100644
--- a/graphingwindow.cpp
+++ b/graphingwindow.cpp
@@ -837,7 +837,7 @@ void GraphingWindow::loadDefinitions()
 
                             for (int b = 0; b < 8; b++)
                             {
-                                if (oldMask & (1 << b))
+                                if (oldMask & (1ull << b))
                                 {
                                     gp.startBit = (8 * oldEnd) + b;
                                     break;
@@ -846,7 +846,7 @@ void GraphingWindow::loadDefinitions()
 
                             for (int c = 7; c >= 0; c--)
                             {
-                                if ( oldMask & (1<<(((numBytes - 1) * 8) + c)) )
+                                if ( oldMask & (1ull << (((numBytes - 1) * 8) + c)) )
                                 {
                                     gp.numBits -= (7-c);
                                     break;
@@ -865,7 +865,7 @@ void GraphingWindow::loadDefinitions()
                             gp.numBits = 8;
                             for (int b = 0; b < 8; b++)
                             {
-                                if (oldMask & (1 << b))
+                                if (oldMask & (1ull << b))
                                 {
                                     gp.startBit = 8 * oldStart + b;
                                     gp.numBits = 8 - b;