diff --git a/backends/imgui_impl_glfw.cpp b/backends/imgui_impl_glfw.cpp
index 3cd87cd39..aff34a573 100644
--- a/backends/imgui_impl_glfw.cpp
+++ b/backends/imgui_impl_glfw.cpp
@@ -1064,7 +1064,7 @@ struct ImGui_ImplGlfw_ViewportData
     WNDPROC     PrevWndProc;
 #endif
 
-    ImGui_ImplGlfw_ViewportData()  { memset(this, 0, sizeof(*this)); IgnoreWindowSizeEventFrame = IgnoreWindowPosEventFrame = -1; }
+    ImGui_ImplGlfw_ViewportData()  { memset((void*)this, 0, sizeof(*this)); IgnoreWindowSizeEventFrame = IgnoreWindowPosEventFrame = -1; }
     ~ImGui_ImplGlfw_ViewportData() { IM_ASSERT(Window == nullptr); }
 };