diff --git a/kcalc.h b/kcalc.h
--- a/kcalc.h
+++ b/kcalc.h
@@ -226,6 +226,8 @@
 
     void slotBaseModeAmountChanged(KNumber number);
 
+    void slotPaste();
+
 private:
     enum StatusField {
         ShiftField = 0,
diff --git a/kcalc.cpp b/kcalc.cpp
--- a/kcalc.cpp
+++ b/kcalc.cpp
@@ -178,7 +178,7 @@
 	KStandardAction::redo(calc_display, SLOT(slotHistoryForward()), actionCollection());
 	KStandardAction::cut(calc_display, SLOT(slotCut()), actionCollection());
 	KStandardAction::copy(calc_display, SLOT(slotCopy()), actionCollection());
-	KStandardAction::paste(calc_display, SLOT(slotPaste()), actionCollection());
+	KStandardAction::paste(this, SLOT(slotPaste()), actionCollection());
 
 	// mode menu
 	QActionGroup *modeGroup = new QActionGroup(this);
@@ -723,6 +723,7 @@
 	val.replace(QLatin1Char('.'), KNumber::decimalSeparator());
 	calc_display->setAmount(KNumber(val));
     updateDisplay({});
+    core.setOnlyUpdateOperation(false);
 }
 
 //------------------------------------------------------------------------------
@@ -1603,6 +1604,7 @@
 		}
 
         updateDisplay({});
+        core.setOnlyUpdateOperation(false);
 	}
 }
 
@@ -2354,6 +2356,15 @@
 	}
 }
 
+//------------------------------------------------------------------------------
+// Name: eventFilter
+// Desc: paste a number from the clipboard
+//------------------------------------------------------------------------------
+void KCalculator::slotPaste() {
+    calc_display->slotPaste();
+    core.setOnlyUpdateOperation(false);
+}
+
 ////////////////////////////////////////////////////////////////
 // Include the meta-object code for classes in this file
 //