diff --git a/docs/changes.txt b/docs/changes.txt
index e80e5e619b..94685943d6 100644
--- a/docs/changes.txt
+++ b/docs/changes.txt
@@ -481,6 +481,7 @@ OSX:
 GTK:
 
 - Generate events for two auxiliary mouse buttons in wxGTK (Marcin Wojdyr).
+- Fix conflict between wxDIALOG_NO_PARENT and wxICON_EXCLAMATION (David Hart).
 
 MSW:
 
diff --git a/include/wx/dialog.h b/include/wx/dialog.h
index 1c19e24c87..1a602c9f96 100644
--- a/include/wx/dialog.h
+++ b/include/wx/dialog.h
@@ -26,7 +26,7 @@ class wxTextSizerWrapper;
 
 // Also see the bit summary table in wx/toplevel.h.
 
-#define wxDIALOG_NO_PARENT      0x0100  // Don't make owned by apps top window
+#define wxDIALOG_NO_PARENT      0x00000020  // Don't make owned by apps top window
 
 #ifdef __WXWINCE__
 #define wxDEFAULT_DIALOG_STYLE  (wxCAPTION | wxMAXIMIZE | wxCLOSE_BOX | wxNO_BORDER)
diff --git a/include/wx/toplevel.h b/include/wx/toplevel.h
index 28a56fe596..1e49a42dd9 100644
--- a/include/wx/toplevel.h
+++ b/include/wx/toplevel.h
@@ -45,10 +45,10 @@ class WXDLLIMPEXP_FWD_CORE wxTopLevelWindowBase;
       |  |  |  |  |  |  |  |  |  |  |  |  |  \_______ wxFRAME_TOOL_WINDOW
       |  |  |  |  |  |  |  |  |  |  |  |  \__________ wxFRAME_FLOAT_ON_PARENT
       |  |  |  |  |  |  |  |  |  |  |  \_____________ wxFRAME_SHAPED
-      |  |  |  |  |  |  |  |  |  |  \________________
+      |  |  |  |  |  |  |  |  |  |  \________________ wxDIALOG_NO_PARENT
       |  |  |  |  |  |  |  |  |  \___________________ wxRESIZE_BORDER
       |  |  |  |  |  |  |  |  \______________________ wxTINY_CAPTION_VERT
-      |  |  |  |  |  |  |  \_________________________ wxDIALOG_NO_PARENT
+      |  |  |  |  |  |  |  \_________________________
       |  |  |  |  |  |  \____________________________ wxMAXIMIZE_BOX
       |  |  |  |  |  \_______________________________ wxMINIMIZE_BOX
       |  |  |  |  \__________________________________ wxSYSTEM_MENU