diff --git a/src/frontends/qt/GuiTabular.cpp b/src/frontends/qt/GuiTabular.cpp
index 84012beb8e..21772ebc6f 100644
--- a/src/frontends/qt/GuiTabular.cpp
+++ b/src/frontends/qt/GuiTabular.cpp
@@ -67,6 +67,12 @@ GuiTabular::GuiTabular(QWidget * parent)
 	bottomspaceUnitLC->setCurrentItem(Length::defaultUnit());
 	interlinespaceUnitLC->setCurrentItem(Length::defaultUnit());
 
+	connect(topspaceCO, SIGNAL(currentIndexChanged(int)),
+		this, SLOT(checkEnabled()));
+	connect(bottomspaceCO, SIGNAL(currentIndexChanged(int)),
+		this, SLOT(checkEnabled()));
+	connect(interlinespaceCO, SIGNAL(currentIndexChanged(int)),
+		this, SLOT(checkEnabled()));
 	connect(topspaceED, SIGNAL(textEdited(const QString &)),
 		this, SLOT(checkEnabled()));
 	connect(topspaceUnitLC, SIGNAL(selectionChanged(lyx::Length::UNIT)),
diff --git a/status.24x b/status.24x
index 89e45f79ff..538c881b43 100644
--- a/status.24x
+++ b/status.24x
@@ -56,6 +56,9 @@ What's new
 
 - Fix performance problems with references with (very) many authors.
 
+- Enable OK/Apply button in tabular dialog when "Additional Space" combo has
+  been set to different value.
+
 
 * INTERNALS