diff --git a/src/common/dobjcmn.cpp b/src/common/dobjcmn.cpp
index dd27a6032d..cbed32d72f 100644
--- a/src/common/dobjcmn.cpp
+++ b/src/common/dobjcmn.cpp
@@ -238,7 +238,7 @@ size_t wxTextDataObject::GetDataSize(const wxDataFormat& format) const
 {
     wxCharBuffer buffer = GetConv(format).cWX2MB( GetText().c_str() );
 
-    return buffer ? strlen( buffer ) + 1 : 0;
+    return buffer ? strlen( buffer ) : 0;
 }
 
 bool wxTextDataObject::GetDataHere(const wxDataFormat& format, void *buf) const
diff --git a/src/gtk/clipbrd.cpp b/src/gtk/clipbrd.cpp
index 3dabd926b4..e5aec7830b 100644
--- a/src/gtk/clipbrd.cpp
+++ b/src/gtk/clipbrd.cpp
@@ -300,7 +300,7 @@ selection_handler( GtkWidget *WXUNUSED(widget),
         gtk_selection_data_set_text(
             selection_data,
             (const gchar*)d,
-            size-1 );
+            size );
     }
     else
     {
@@ -309,7 +309,7 @@ selection_handler( GtkWidget *WXUNUSED(widget),
             GDK_SELECTION_TYPE_STRING,
             8*sizeof(gchar),
             (unsigned char*) d,
-            size-1 );
+            size );
     }
 
     free(d);
diff --git a/src/gtk1/clipbrd.cpp b/src/gtk1/clipbrd.cpp
index f9d56bf0f8..43b4ccea5e 100644
--- a/src/gtk1/clipbrd.cpp
+++ b/src/gtk1/clipbrd.cpp
@@ -298,7 +298,7 @@ selection_handler( GtkWidget *WXUNUSED(widget),
             GDK_SELECTION_TYPE_STRING,
             8 * sizeof(gchar),
             (unsigned char*) d,
-            size-1 );
+            size );
 
     free(d);
 }