diff --git a/slideshow/source/engine/color.cxx b/slideshow/source/engine/color.cxx
index 1109d4e68b2b..88f75629cdbd 100644
--- a/slideshow/source/engine/color.cxx
+++ b/slideshow/source/engine/color.cxx
@@ -311,11 +311,6 @@ namespace slideshow::internal
                      rLHS.getBlue() == rRHS.getBlue() );
         }
 
-        bool operator!=( const RGBColor& rLHS, const RGBColor& rRHS )
-        {
-            return !( rLHS == rRHS );
-        }
-
         RGBColor operator+( const RGBColor& rLHS, const RGBColor& rRHS )
         {
             return RGBColor( rLHS.getRed() + rRHS.getRed(),
diff --git a/slideshow/source/inc/rgbcolor.hxx b/slideshow/source/inc/rgbcolor.hxx
index b5f3f8e610fc..ebb831f4d14d 100644
--- a/slideshow/source/inc/rgbcolor.hxx
+++ b/slideshow/source/inc/rgbcolor.hxx
@@ -74,7 +74,6 @@ namespace slideshow::internal
         };
 
         bool operator==( const RGBColor& rLHS, const RGBColor& rRHS );
-        bool operator!=( const RGBColor& rLHS, const RGBColor& rRHS );
         RGBColor operator+( const RGBColor& rLHS, const RGBColor& rRHS );
         RGBColor operator*( const RGBColor& rLHS, const RGBColor& rRHS );
         RGBColor operator*( double nFactor, const RGBColor& rRHS );