diff --git a/src/gtk/colour.cpp b/src/gtk/colour.cpp
index db73e73343..9d4e90e393 100644
--- a/src/gtk/colour.cpp
+++ b/src/gtk/colour.cpp
@@ -33,7 +33,7 @@ class wxColourRefData: public wxObjectRefData
     GdkColormap *m_colormap;
     bool         m_hasPixel;
 
-    friend wxColour;
+    friend class wxColour;
 };
 
 wxColourRefData::wxColourRefData()
diff --git a/src/gtk/font.cpp b/src/gtk/font.cpp
index 8cb33978d1..83010c18da 100644
--- a/src/gtk/font.cpp
+++ b/src/gtk/font.cpp
@@ -71,7 +71,7 @@ private:
     wxString        m_faceName;
     wxFontEncoding  m_encoding;
 
-    friend wxFont;
+    friend class wxFont;
 };
 
 // ============================================================================
diff --git a/src/gtk1/colour.cpp b/src/gtk1/colour.cpp
index db73e73343..9d4e90e393 100644
--- a/src/gtk1/colour.cpp
+++ b/src/gtk1/colour.cpp
@@ -33,7 +33,7 @@ class wxColourRefData: public wxObjectRefData
     GdkColormap *m_colormap;
     bool         m_hasPixel;
 
-    friend wxColour;
+    friend class wxColour;
 };
 
 wxColourRefData::wxColourRefData()
diff --git a/src/gtk1/font.cpp b/src/gtk1/font.cpp
index 8cb33978d1..83010c18da 100644
--- a/src/gtk1/font.cpp
+++ b/src/gtk1/font.cpp
@@ -71,7 +71,7 @@ private:
     wxString        m_faceName;
     wxFontEncoding  m_encoding;
 
-    friend wxFont;
+    friend class wxFont;
 };
 
 // ============================================================================