diff --git a/src/frontends/qt4/GuiHSpace.cpp b/src/frontends/qt4/GuiHSpace.cpp
index a896c1efff..9bb7e3994c 100644
--- a/src/frontends/qt4/GuiHSpace.cpp
+++ b/src/frontends/qt4/GuiHSpace.cpp
@@ -83,6 +83,7 @@ GuiHSpace::GuiHSpace(bool math_mode, QWidget * parent)
 
 	// initialize the length validator
 	addCheckedWidget(valueLE, valueL);
+	enableWidgets();
 }
 
 
diff --git a/status.20x b/status.20x
index ae9b356ed1..38eae0c72c 100644
--- a/status.20x
+++ b/status.20x
@@ -53,6 +53,8 @@ What's new
 
 - Update citation labels when the BibTeX file changes (bug 7499).
 
+- Fix inconsistent state of horizontal space dialog on start up (bug 7906).
+
 - Unify diplay of theorem headings (bug 7883).