diff --git a/src/Magnum/Platform/EmscriptenApplication.h b/src/Magnum/Platform/EmscriptenApplication.h
index c18a336c1..cf2bf2ab1 100644
--- a/src/Magnum/Platform/EmscriptenApplication.h
+++ b/src/Magnum/Platform/EmscriptenApplication.h
@@ -1338,7 +1338,7 @@ enum class EmscriptenApplication::Key: Int {
 
     /**
      * Plus. On the US keyboard layout this may only be representable as
-     * @m_class{m-label m-warning} **Shift** @m_class{m-label m-default} **=**.
+     * @m_class{m-label m-warning} **Shift** @m_class{m-label m-default} <b>=</b>.
      */
     Plus,
 
diff --git a/src/Magnum/Platform/GlfwApplication.h b/src/Magnum/Platform/GlfwApplication.h
index 066c9a9e7..14a67b404 100644
--- a/src/Magnum/Platform/GlfwApplication.h
+++ b/src/Magnum/Platform/GlfwApplication.h
@@ -1167,7 +1167,7 @@ enum class GlfwApplication::Key: Int {
 
     /**
      * Plus. On the US keyboard layout this may only be representable as
-     * @m_class{m-label m-warning} **Shift** @m_class{m-label m-default} **=**.
+     * @m_class{m-label m-warning} **Shift** @m_class{m-label m-default} <b>=</b>.
      */
     Plus = '+',
 
diff --git a/src/Magnum/Platform/Sdl2Application.h b/src/Magnum/Platform/Sdl2Application.h
index f0be2c2c9..4de6d6641 100644
--- a/src/Magnum/Platform/Sdl2Application.h
+++ b/src/Magnum/Platform/Sdl2Application.h
@@ -1744,7 +1744,7 @@ enum class Sdl2Application::Key: SDL_Keycode {
 
     /**
      * Plus. On the US keyboard layout this may only be representable as
-     * @m_class{m-label m-warning} **Shift** @m_class{m-label m-default} **=**.
+     * @m_class{m-label m-warning} **Shift** @m_class{m-label m-default} <b>=</b>.
      */
     Plus = SDLK_PLUS,