diff --git a/clients/laptop/laptopclient.cpp b/clients/laptop/laptopclient.cpp
index 8cdd104c23..224847fcbc 100644
--- a/clients/laptop/laptopclient.cpp
+++ b/clients/laptop/laptopclient.cpp
@@ -732,6 +732,7 @@ bool LaptopClientFactory::supports( Ability ability ) const
         case AbilityButtonMinimize:
         case AbilityButtonMaximize:
         case AbilityButtonClose:
+        case AbilityButtonSpacer:
         // colors
         case AbilityColorTitleBack:
         case AbilityColorTitleFore:
diff --git a/clients/oxygen/oxygen.cpp b/clients/oxygen/oxygen.cpp
index a3d8b1307a..a26a91ba15 100644
--- a/clients/oxygen/oxygen.cpp
+++ b/clients/oxygen/oxygen.cpp
@@ -132,6 +132,7 @@ bool OxygenFactory::supports( Ability ability ) const
         case AbilityButtonMinimize:
         case AbilityButtonMaximize:
         case AbilityButtonClose:
+        case AbilityButtonSpacer:
             return true;
         // no colors supported at this time
         default:
diff --git a/clients/web/Web.cpp b/clients/web/Web.cpp
index 82583abd1d..d46e1c3f66 100644
--- a/clients/web/Web.cpp
+++ b/clients/web/Web.cpp
@@ -368,6 +368,7 @@ bool WebFactory::supports( Ability ability ) const
         case AbilityButtonAboveOthers:
         case AbilityButtonBelowOthers:
         case AbilityButtonShade:
+        case AbilityButtonSpacer:
         // colors:
         case AbilityColorTitleBack:
         case AbilityColorTitleFore: