diff --git a/sw/source/core/inc/swfont.hxx b/sw/source/core/inc/swfont.hxx
index d44055a8dd49..19596895847c 100644
--- a/sw/source/core/inc/swfont.hxx
+++ b/sw/source/core/inc/swfont.hxx
@@ -64,8 +64,6 @@ class SwSubFont : public SvxFont
                           const sal_uInt16 nOldAscent ) const;
     void CalcEsc( SwDrawTextInfo const & rInf, Point& rPos );
 
-    SwSubFont& operator=( const SwSubFont& );
-
     short CheckKerning_( );
 
     bool ChgFnt( SwViewShell const *pSh, OutputDevice& rOut );
diff --git a/sw/source/core/txtnode/swfont.cxx b/sw/source/core/txtnode/swfont.cxx
index ed23fff22623..f9c301f59bf6 100644
--- a/sw/source/core/txtnode/swfont.cxx
+++ b/sw/source/core/txtnode/swfont.cxx
@@ -888,8 +888,6 @@ SwFont::~SwFont()
 {
 }
 
-SwSubFont& SwSubFont::operator=( const SwSubFont& ) = default;
-
 SwFont& SwFont::operator=( const SwFont &rFont )
 {
     m_aSub[SwFontScript::Latin] = rFont.m_aSub[SwFontScript::Latin];