diff --git a/widget/src/gtk2/nsDeviceContextSpecG.cpp b/widget/src/gtk2/nsDeviceContextSpecG.cpp
index a7972932752a..708fb762bf40 100644
--- a/widget/src/gtk2/nsDeviceContextSpecG.cpp
+++ b/widget/src/gtk2/nsDeviceContextSpecG.cpp
@@ -180,11 +180,6 @@ public:
   /* Does this device allow to set/change number of copies for an document ? */
   void SetCanChangeNumCopies( bool aCanSetNumCopies );
 
-  /* Does this device allow multiple devicecontext instances to be used in
-   * parallel (e.g. print while the device is already in use by print-preview
-   * or printing while another print job is in progress) ? */
-  void SetMultipleConcurrentDeviceContextsSupported( bool aCanUseMultipleInstances );
-  
 private:
   /* private helper methods */
   void SetBoolValue( const char *tagname, bool value );
@@ -372,11 +367,6 @@ void nsPrinterFeatures::SetCanChangeNumCopies( bool aCanSetNumCopies )
   SetBoolValue("can_change_num_copies", aCanSetNumCopies);
 }
 
-void nsPrinterFeatures::SetMultipleConcurrentDeviceContextsSupported( bool aCanUseMultipleInstances )
-{
-  SetBoolValue("can_use_multiple_devicecontexts_concurrently", aCanUseMultipleInstances);
-}
-
 #endif /* SET_PRINTER_FEATURES_VIA_PREFS */
 
 //---------------