diff --git a/src/mac/carbon/brush.cpp b/src/mac/carbon/brush.cpp
index 95bb600893..4eacf54a31 100644
--- a/src/mac/carbon/brush.cpp
+++ b/src/mac/carbon/brush.cpp
@@ -129,7 +129,7 @@ void wxBrush::Unshare()
     {
         m_refData = new wxBrushRefData();
     }
-    else
+    else if (m_refData->GetRefCount() > 1)
     {
         wxBrushRefData* ref = new wxBrushRefData(*(wxBrushRefData*)m_refData);
         UnRef();
diff --git a/src/mac/carbon/font.cpp b/src/mac/carbon/font.cpp
index 52dbecd1ba..7dced09cc4 100644
--- a/src/mac/carbon/font.cpp
+++ b/src/mac/carbon/font.cpp
@@ -456,7 +456,7 @@ void wxFont::Unshare()
     {
         m_refData = new wxFontRefData();
     }
-    else
+    else if (m_refData->GetRefCount() > 1)
     {
         wxFontRefData* ref = new wxFontRefData(*(wxFontRefData*)m_refData);
         UnRef();
diff --git a/src/mac/carbon/pen.cpp b/src/mac/carbon/pen.cpp
index 7f0acfebe5..59335b457f 100644
--- a/src/mac/carbon/pen.cpp
+++ b/src/mac/carbon/pen.cpp
@@ -93,7 +93,7 @@ void wxPen::Unshare()
     {
         m_refData = new wxPenRefData();
     }
-    else
+    else if (m_refData->GetRefCount() > 1)
     {
         wxPenRefData* ref = new wxPenRefData(*(wxPenRefData*)m_refData);
         UnRef();
diff --git a/src/msw/font.cpp b/src/msw/font.cpp
index 397a8c14f0..28b938b1a3 100644
--- a/src/msw/font.cpp
+++ b/src/msw/font.cpp
@@ -903,7 +903,7 @@ void wxFont::Unshare()
     {
         m_refData = new wxFontRefData();
     }
-    else
+    else if (m_refData->GetRefCount() > 1)
     {
         wxFontRefData* ref = new wxFontRefData(*M_FONTDATA);
         UnRef();
diff --git a/src/msw/pen.cpp b/src/msw/pen.cpp
index 92b08327a6..62065284aa 100644
--- a/src/msw/pen.cpp
+++ b/src/msw/pen.cpp
@@ -277,7 +277,7 @@ void wxPen::Unshare()
     {
         m_refData = new wxPenRefData();
     }
-    else
+    else if (m_refData->GetRefCount() > 1)
     {
         wxPenRefData* ref = new wxPenRefData(*(wxPenRefData*)m_refData);
         UnRef();