From 3a26b640b2f2a4b9a9aa1e176cb967ca54c88cec Mon Sep 17 00:00:00 2001
From: ocornut <omar@miracleworld.net>
Date: Fri, 20 Mar 2026 11:50:05 +0100
Subject: [PATCH] Drag and Drop: make SetDragDropPayload() memcpy size match
 our buffer.

---
 imgui.cpp | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/imgui.cpp b/imgui.cpp
index 1cada18fc..26518852a 100644
--- a/imgui.cpp
+++ b/imgui.cpp
@@ -14931,14 +14931,14 @@ bool ImGui::SetDragDropPayload(const char* type, const void* data, size_t data_s
             // Store in heap
             g.DragDropPayloadBufHeap.resize((int)data_size);
             payload.Data = g.DragDropPayloadBufHeap.Data;
-            memcpy(payload.Data, data, data_size);
+            memcpy(payload.Data, data, (size_t)(int)data_size);
         }
         else if (data_size > 0)
         {
             // Store locally
             memset(&g.DragDropPayloadBufLocal, 0, sizeof(g.DragDropPayloadBufLocal));
             payload.Data = g.DragDropPayloadBufLocal;
-            memcpy(payload.Data, data, data_size);
+            memcpy(payload.Data, data, (size_t)(int)data_size);
         }
         else
         {