diff --git a/terminal/plugins/org.eclipse.tm.terminal.control/src/org/eclipse/tm/internal/terminal/textcanvas/GridCanvas.java b/terminal/plugins/org.eclipse.tm.terminal.control/src/org/eclipse/tm/internal/terminal/textcanvas/GridCanvas.java
index 7c9f4fd2f6d..c727d9910f4 100644
--- a/terminal/plugins/org.eclipse.tm.terminal.control/src/org/eclipse/tm/internal/terminal/textcanvas/GridCanvas.java
+++ b/terminal/plugins/org.eclipse.tm.terminal.control/src/org/eclipse/tm/internal/terminal/textcanvas/GridCanvas.java
@@ -32,9 +32,7 @@ abstract public class GridCanvas extends VirtualCanvas {
 		super(parent, style);
 		addListener(SWT.MouseWheel, event -> {
 			if (getVerticalBar().isVisible()) {
-				int delta = -fCellHeight;
-				if (event.count < 0)
-					delta = -delta;
+				int delta = -fCellHeight * event.count;
 				scrollYDelta(delta);
 			}
 			event.doit = false;