diff --git a/Graphs/gYAxis.cpp b/Graphs/gYAxis.cpp
index 4d8b1851..ca848846 100644
--- a/Graphs/gYAxis.cpp
+++ b/Graphs/gYAxis.cpp
@@ -70,10 +70,15 @@ void gYAxis::Plot(gGraphWindow &w,float scrx,float scry)
 
     glColor4ub(linecol1.red(),linecol1.green(),linecol1.blue(),linecol1.alpha());
     glLineWidth(1);
+    if (min_ytick<=0) {
+        qDebug() << "min_ytick error in gYAxis::Plot()";
+        return;
+    }
     if (min_ytick>=1000000) {
         min_ytick=100;
     }
 
+
     for (double i=miny+(min_ytick/2.0); i<maxy; i+=min_ytick) {
         ty=(i - miny) * ymult;
         h=(start_py+height)-ty;
diff --git a/SleepyHeadQT.pro b/SleepyHeadQT.pro
index bcae847d..2e484f31 100644
--- a/SleepyHeadQT.pro
+++ b/SleepyHeadQT.pro
@@ -6,7 +6,7 @@
 
 QT += core gui webkit opengl
 
-#CONFIG += static
+CONFIG += rtti
 
 #static {
 #    CONFIG += static