diff --git a/src/LogTimeScaleEngine.cpp b/src/LogTimeScaleEngine.cpp
index 9c7ef659d..39cbc3f54 100644
--- a/src/LogTimeScaleEngine.cpp
+++ b/src/LogTimeScaleEngine.cpp
@@ -54,8 +54,14 @@ void LogTimeScaleEngine::autoScale(int maxNumSteps,
         qSwap(x1, x2);
 
     QwtDoubleInterval interval(
-			       x1 / pow(10.0, loMargin()), 
-			       x2 * pow(10.0, hiMargin())
+                               
+     #if (QWT_VERSION >= 0x050200)
+            x1 / pow(10.0, lowerMargin()), 
+            x2 * pow(10.0, upperMargin())
+     #else
+            x1 / pow(10.0, loMargin()), 
+            x2 * pow(10.0, hiMargin())
+    #endif
     );
 
     double logRef = 1.0;