diff --git a/bundles/org.eclipse.core.runtime/src/org/eclipse/core/runtime/Preferences.java b/bundles/org.eclipse.core.runtime/src/org/eclipse/core/runtime/Preferences.java
index 8075dee..ec680f6 100644
--- a/bundles/org.eclipse.core.runtime/src/org/eclipse/core/runtime/Preferences.java
+++ b/bundles/org.eclipse.core.runtime/src/org/eclipse/core/runtime/Preferences.java
@@ -668,7 +668,7 @@
 			// mark as dirty since value did really change
 			dirty = true;
 			// report property change if getValue now returns different value
-			firePropertyChangeEvent(name, Double.valueOf(oldValue), new Double(value));
+			firePropertyChangeEvent(name, Double.valueOf(oldValue), Double.valueOf(value));
 		}
 	}
 
@@ -786,7 +786,7 @@
 			// mark as dirty since value did really change
 			dirty = true;
 			// report property change if getValue now returns different value
-			firePropertyChangeEvent(name, Float.valueOf(oldValue), new Float(value));
+			firePropertyChangeEvent(name, Float.valueOf(oldValue), Float.valueOf(value));
 		}
 	}