diff --git a/include/wx/utils.h b/include/wx/utils.h
index f87b92cf50..b522ec1f51 100644
--- a/include/wx/utils.h
+++ b/include/wx/utils.h
@@ -730,10 +730,10 @@ class WXDLLIMPEXP_CORE wxWindowDisabler
 public:
     // this ctor conditionally disables all windows: if the argument is false,
     // it doesn't do anything
-    wxWindowDisabler(bool disable = true);
+    explicit wxWindowDisabler(bool disable = true);
 
     // ctor disables all windows except winToSkip
-    wxWindowDisabler(wxWindow *winToSkip);
+    explicit wxWindowDisabler(wxWindow *winToSkip);
 
     // dtor enables back all windows disabled by the ctor
     ~wxWindowDisabler();
diff --git a/interface/wx/utils.h b/interface/wx/utils.h
index e1fd9c37cf..4d4c01920e 100644
--- a/interface/wx/utils.h
+++ b/interface/wx/utils.h
@@ -84,7 +84,7 @@ public:
 
         @since 2.9.0
     */
-    wxWindowDisabler(bool disable = true);
+    explicit wxWindowDisabler(bool disable = true);
 
     /**
         Disables all top level windows of the applications with the exception
@@ -98,7 +98,7 @@ public:
         or wxFRAME_NO_TASKBAR style when creating the window that will remain
         enabled.
     */
-    wxWindowDisabler(wxWindow* winToSkip);
+    explicit wxWindowDisabler(wxWindow* winToSkip);
 
     /**
         Reenables the windows disabled by the constructor.