diff --git a/Common/Gfx/TextFormat.h b/Common/Gfx/TextFormat.h
index 9926566e..418f077e 100644
--- a/Common/Gfx/TextFormat.h
+++ b/Common/Gfx/TextFormat.h
@@ -43,16 +43,16 @@ class __declspec(novtable) TextFormat
 public:
 	virtual ~TextFormat();
 
-	virtual bool IsInitialized() = 0;
+	virtual bool IsInitialized() const = 0;
 	virtual void SetProperties(const WCHAR* fontFamily, int size, bool bold, bool italic, Gdiplus::PrivateFontCollection* fontCollection) = 0;
 
 	virtual void SetTrimming(bool trim) = 0;
 
 	virtual void SetHorizontalAlignment(HorizontalAlignment alignment);
-	HorizontalAlignment GetHorizontalAlignment() { return m_HorizontalAlignment; }
+	HorizontalAlignment GetHorizontalAlignment() const { return m_HorizontalAlignment; }
 
 	virtual void SetVerticalAlignment(VerticalAlignment alignment);
-	VerticalAlignment GetVerticalAlignment() { return m_VerticalAlignment; }
+	VerticalAlignment GetVerticalAlignment() const { return m_VerticalAlignment; }
 
 protected:
 	TextFormat();
diff --git a/Common/Gfx/TextFormatD2D.h b/Common/Gfx/TextFormatD2D.h
index 55905d8e..10a0d769 100644
--- a/Common/Gfx/TextFormatD2D.h
+++ b/Common/Gfx/TextFormatD2D.h
@@ -30,7 +30,7 @@ public:
 	TextFormatD2D();
 	virtual ~TextFormatD2D();
 
-	virtual bool IsInitialized() { return m_TextFormat != nullptr; }
+	virtual bool IsInitialized() const override { return m_TextFormat != nullptr; }
 	virtual void SetProperties(const WCHAR* fontFamily, int size, bool bold, bool italic, Gdiplus::PrivateFontCollection* fontCollection) override;
 
 	virtual void SetTrimming(bool trim) override;
diff --git a/Common/Gfx/TextFormatGDIP.h b/Common/Gfx/TextFormatGDIP.h
index a9e25fe2..1189a5e2 100644
--- a/Common/Gfx/TextFormatGDIP.h
+++ b/Common/Gfx/TextFormatGDIP.h
@@ -30,7 +30,7 @@ public:
 	TextFormatGDIP();
 	virtual ~TextFormatGDIP();
 
-	virtual bool IsInitialized() { return m_Font != nullptr; }
+	virtual bool IsInitialized() const override { return m_Font != nullptr; }
 	virtual void SetProperties(const WCHAR* fontFamily, int size, bool bold, bool italic, Gdiplus::PrivateFontCollection* fontCollection) override;
 
 	virtual void SetTrimming(bool trim) override;